Louis Heilprin (1851-1912) was a Hungarian American author, historian, and encyclopedia editor. He was born in Miskolc, Hungary in 1851. His father, Michael, was also an encyclopedist and scholar of Hebrew history and literature and a follower of Lajos Kossuth. He had a brother Angelo who was a professor at the Philadelphia Academy of Sciences and two sisters. The family left Hungary as refugees in 1856. Heilprin was educated by his father.