This started out as a "how realistic is x fictional depiction" question (concerning Michael Ginsberg's orphanage backstory in Mad Men) but when I Googled around I ran into an account by Jeannine Burk that made me realize how little I knew about the situation for survivor children exposed without adult advocates -- were aid attempts like Burk received (sponsorship by the International Ladies' Garment Workers' Union/attempts to reconnect her with surviving relatives in North America and later adoption by an American family) more than an isolated phenomenon? Was there any humanitarian support for displaced children left without an immediate relative as their guardian?
There’s a book called “The Boys” by Martin Gilbert. It’s inexpensively available on Amazon. It’s basically a series of interviews with orphaned holocaust survivors that were relocated to England. “At the end of World War II, Britain offered to take in 1,000 young survivors of the German concentration camps; only 732 could be found.” The orphans’ accounts of their experiences and culture before the war as well as their stories of survival and recovery are wrenchingly heartbreaking and amazing.