American encyclopedist; son of Michael Heilprin; born in Miskolcz, Hungary, July 2, 1851. He emigrated with his parents to the United States in 1856, and was educated privately. He contributed articles to the second edition of the "American Cyclopædia," of which his father was one of the associate editors. He is the author of the "Historical Reference Book" (New York, 1884; 6th ed., ib. 1899), a standard book ofreference. He became editorially connected with the "New International Encyclopedia" in 1902, and is at present associated with his brother, Angelo Heilprin, in the preparation of a new edition of "Lippincott's Gazetteer of the World."
- Who's Who in America, Chicago, 1899.