Paul de Longpré is listed in the 1900 US Census, Los Angeles City Ward 5, Precincts 38 B and 73 A, with his wife Josephine and daughters Blance, Alice, and Pauline. His occupation is listed as Artist, but the last name is misspelled as De Lonpre, It indicates Paul, Josephine, Blance, and Alice were born in France, and Pauline was born in New York City. The architect Louis Bourgeois also taught French to de Longpré's daughters, and later married Alice.
