The Kafka-Goldschmied Family Collection includes theater programs and clippings of opera productions, starring the Viennese opera singer Frieda Kafka Bauer. Also included here is correspondence from Joseph and Maria Jung to their aunt, Eugenie Goldschmied, née Kafka, poems by Fred Bloch, and thank you letters and invitations.

The collection traces the history of the Kaiser family and the lives of its members over the course of the 20th century through correspondence, documents, writings, family history information, and photographs.

This collection documents the life and work of the law librarian Kate Wallach. Contained in this collection are papers relating to her personal life, mainly her correspondence between her and her parents and her brother when she was already in the United States, as well as official documents and professional correspondence between her as a law librarian and members of other academic libraries. Kate Wallach was among the first 150 women to practice law in the state of Wisconsin.

The Katzenstein Family Collection holds the papers and correspondence of Martin Katzenstein and Anna Charlotte Katzenstein. The collection contains genealogical materials, personal letters, and official papers relating to Anna's time spent living in England and Chile.

The Kern-Martin Family Collection contains extensive family correspondence and documentation of members of the related Kern-Martin, Kern, Temple, and other families. Correspondence with friends, colleagues, and more distant relatives is included. Other family members' papers include many family photographs, education documents, writings and diaries, official documents, obituaries, and other papers.

The Kirby Kantor Fuchs Collection consists of the papers of Fred and Lisa Kirby and their family members in the Kantor, Fuchs, Mahrer, and Schüssler families. Most of the collection consists of the official documents of the family members, along with restitution correspondence, and details the family members' early lives in Europe and their later emigrations to England and the United States. The collection includes many official documents, restitution correspondence, family photographs, educational and professional papers, some genealogical research, and other papers.

The Kornstein-Rosenthal Collection documents the most notable events in the lives of members of the Kornstein and related families, especially of Adolf and Suse Kornstein. Prominent in this collection is the comprehensive family correspondence, providing a view of the daily events of family members for nearly two decades. In addition, the collection contains a detailed narrative based on these letters. Other material includes educational and official papers, some compositions of family members, family trees and other genealogical information and photographs.

The collection provides information about the Kress-Heinemann family. It includes school report cards of Eva Heinemann and Walter Kreslawsky, recipes, genealogical research results and a portrait of Walter Heinemann.

The collection consists of documents, photographs, clippings, ephemera pertaining to three generations of the Kroner family from Berlin, Germany.

The collection contains materials relating to Kurt Goldsmith, a New York-based photographer, and his wife Grete née Lendt. Kurt and his family escaped Nazi Germany to ultimately settle in New York City. The materials trace the journey that they and their family took to seek asylum in the United States. The collection is made up of personal documents, correspondence, photographs, and other archival materials.

The Kurt Roberg Collection focuses on the immigration and wartime experiences of Kurt Roberg and other members of the Roberg and Marx families, in addition to documentation on the genealogy of the families. The collection contains considerable correspondence, official and other documents, photographs and genealogical research.

The Landau Family Collection holds documents pertaining to the restitution claims for the estate of Marianne Landau, including their property located at Pariser Platz 6a in Berlin. The correspondence in the collection details the efforts, sought out by the heirs of the Landau family, to receive compensation for a number of assets lost during the Nazi's reign and World War II. Also included are photographs, as well as legal, financial, and genealogical documents relating to specific members of the family.

This collection contains the personal papers of members of the Leiter and Berliner families of Hamburg and Berlin. Some members of these families immigrated to the United States in the late 1930s while others survived World War II in Amsterdam, as forced laborers in Berlin, or in Theresienstadt. Materials include vital documents, official papers, personal correspondence, poems, clippings, official announcements and orders, banking records, restitution materials, and a few photographs.

The Leo Abraham Collection documents the immigration of Leo Abraham to the United States on the eve of World War II. The collection contains mostly personal papers and correspondence to his family who he attempted to get clearance to immigrate as well. After 1945, most of the papers in the collection are related to restitution for his loss of property.

The Leo Glueckselig Collection includes materials pertaining to Leo Glueckselig and other members of the Glueckselig family and consists mostly of personal correspondence, photographs, and documents, whereas other document types such as printed materials, manuscripts, art works, and a cookbook constitute a smaller part of the collection.

This collection documents the personal lives of Leo Rapp (1924-2004), his wife Hildegard Rapp née Kaiser (1921-1997), his aunt Rosa Lang née Rapp, and her husband Julius Lang. There are approximately equal amounts of papers and photographs ranging from the late 19th century through approximately 2005. The papers include vital records, immigration papers, military records, tax records, school grades, correspondence, biographical notes, and family trees. The photographs consist mainly of formal and casual photographs of Leo Rapp, Rosa Lang, and Julius Lang, alongside many family group photographs.

The Leonie and Ernst Steiner collection contains photographs of three generations, official and legal documents and certificates of the time when the family members became American citizens. There is also some correspondence, for example from the young Eva Steiner in London to her father Ernst in the United States.

This collection centers on the restitution claims of Leonie R. Field and her siblings, as well as on payments made to her by the German government. A smaller amount of papers pertains to her immigration, with biographical information also present. The collection includes copious correspondence and financial records along with official documents and a small amount of official and financial correspondence related to immigration.

Leopold Levi was a merchant in Stuttgart. Most of the material in this collection gives information on his activities for Jewish organizations and the Jewish Community in Wuerttemberg. Levi was a member of the Oberrat der Israelitischen Religionsgemeinschaft Wuerttembergs (from 1919 to 1940) and of the Israelitisches Gemeindevorsteheramt. He also was an Oberkirchenvorsteher in the Oberkirchenbehoerde and he was active in the Chewra Kadischa. Furthermore he assisted the Juedische Nothilfe. During the years 1941-1943 he succeeded to immigrate to the United States. He died in 1968 in New York.

The Levi Family Collection primarily tells the story of Eric Levi and his family from Ellwangen, Germany, especially focusing on his loss of schooling in Ellwangen and later service in the United States Army during World War II. The collection also includes information on the family of Inge Levi (née Thalheimer), the Thalheimer family of Bensheim. The collection includes many photographs, official documents, newspaper clippings, military records, articles about Eric Levi as well as the Thalheimer family, some correspondence, a scrapbook, and other documentation.

This collection documents the survival of Alfred, Meta, Marlyse and Theo Levy during the Nazi regime in the Saar, Luxembourg and France. Amongst others it encompasses the voluminous correspondence between the Levy and the Scherman families during World War II and their restitution papers. The register of surviving members of the Jewish community in Saarbrücken after 1945 is one of the remarkable documents in this collection.

The Lewald, Löwenstein, Nachmann and Rothschild family papers contain first and foremost documents related to the genealogy of these families.

The Lichtwitz Family Collection documents the professional lives of the physician Jakob Lichtwitz and his son Leopold. There is some additional material on Rabbi Max Freudenthal of Dessau. The collection includes official documents, correspondence and certificates as well as a few invitations and a postcard.

The Lila and Leo Marx Collection contains the papers of this couple, with documentation about their early lives in Germany and the effects on their lives by Nazi persecution, their subsequent emigration, and the fates of their family members. Much of the collection focuses on their restitution claims and financial situation. The collection consists of a large amount of restitution correspondence; family correspondence; official, educational, and employment documents; a chronology and narrative of the lives of Lila and Leo Marx and their families; and a few photographic postcards.

The Lilian Singer Collection includes materials pertaining to the personal life and professional activities of Lilian Singer and some members of her family. The bulk of the collection consists of photographs; other materials include personal, educational, immigration, and professional documents, correspondence, and sketches.

This collection tells the story of Liselotte (Lilo) Thekla Lamm, her parents Leo Lamm and Margarete (Gretel) Lamm née Falk, husbands Norbert Goldenberg, Hans Gerhard Ollendorff, and William (Bill) Thurnauer, their children and grandchildren, and members of their extended families. The families’ lives in Germany, immigration to the United States, and professional, political and philanthropic activities are documented through vital documents, photographs, correspondence, writings, articles, and clippings.

This collection documents the genealogy of the Lismann family as well as the personal lives of Heinrich Lismann and his son Gerald (born Gerhart) during both world wars and their eventual emigration to the United States. The genealogical materials include family trees, family chronicles, correspondence, notes, photographs, and photographic negatives. The materials on Heinrich and Gerald include correspondence, passports, poems, clippings, visa applications, a biography and death announcements, ephemera, and limited restitution papers.

This collection contains personal papers of Siegfried Loeb and Else Loeb née Feibes and their immediate family members. The Loebs fled Germany for Palestine and then the United States, settling in Forest Hills, New York. Included are family trees, emigration papers, official documents, photographs, Julian Ulrich Loeb’s U.S. Army papers, and a cookbook.

This collection consists of papers of the Loewen family, including Samuel Liepmann Loewen and Liepmann (Leopold) Loewen. It includes personal, business and official papers, correspondence, genealogy, a collection of wax seals, some newspaper clippings, art prints, and a few photographs.

This collection contains materials relating to Erna Loewenstein née Kahn and her family. It includes correspondence between family members in New York and Bingen am Rhein, Germany during World War Two, as well as various items such as passports, photographs, and other documents.