Ancestry recently added two new data sets (with data from the Arolsen Archives but much more nicely indexed and user-friendly to search) that document Holocaust survivors--and sometimes their relatives who didn't survive (including mothers' maiden names). (As that these are part of the Holocaust collection, they do not require a subscription--but do require a free Ancestry account.) But there are also some peculiarities with the search functionality when searching for towns of origin. So what can you potentially find--and how would you search? And how do you make sure you're not missing critical records because the searches you're using aren't catching what you think they would?