I saw this recently on FamilySearch – The Arolsen Archives: Finding Your Jewish Ancestors: https://www.familysearch.org/en/blog/arolsen-archives-jewish-ancestors Longer article, but I included the topics below. The last topic below has several sub-topics in it. I have talked about this archives before Ancestry® Completes the Arolsen Archives Collection with 19 Million Holocaust Records – August 26, 2020; Arolsen Archives quietly adds 13 million more WWII records… — Find Lost Russian & Ukrainian Family; Ancestry® Unveils Two Unique Holocaust Record Collections, Making Them Searchable Online for the First Time Ever – July 31, 2019; and More than 13 million documents online – Arolsen Archives International Center on Nazi Persecution.
Several years ago, Todd Knowles, Deputy Chief Genealogical Officer at FamilySearch, visited the synagogue in his ancestral hometown of Fordon, Poland, where he became friends with the local Rabbi. Todd’s ancestors had immigrated and become citizens of the United States during the mid-1800s—long before World War II. Nevertheless, by searching records in the Arolsen Archives of Jews captured during World War II, he found that he and the Rabbi had mutual Jewish relatives who were captured during World War II. The Arolsen Archives is a great resource to help you find your Jewish ancestors who were affected by the events of World War II.
What Is the Arolsen Archives?