Mina Rosenberg married Jozeph Leefsma in 1904. Together they had three children. Elisabeth was one of them. Jozeph Leefsma died in 1920.
Stadsarchief Amsterdam, archiefkaart Mina Rosenberg
In December 1941, an obituary was placed in Het Joodsche Weekblad for J. Leefsma-Rosenberg.
Het Joodsche Weekblad, 26 December 1941, 8