Frederick (age 8) and two siblings; Rudolph (10) and Dora (7) are enumerated in the 1900 census at the Society for the Relief of Halp Orphan and Destitute children. The census records all the children were born in New York and both parents in Germany.
1930 census at Brooklyn, Kings, NY shows Fred Leitke, 39, married at age 28, b. NY, parents b. NY/NY, chauffuer, ice truck; Theresa, 31, married at 20, b. Canada (E), parents b. NY/CANADA (E); children, b. NY: Agatha, 10; Elenore, 8; Fred Jr., 5.