Epraim Streep was the son of Salomon Streep and Eva Soester. He married Estella Roe in 1918. The couple had at least one daughter, Evaline Streep.
After his first wife died in 1933, Ephraim Streep married Sara Keizer. She had a son , Maurits Frankenhuis, from a previous marriage.
Amsterdam Municipal Archives; record card of Ephraim Streep
Biography