Levij Os was a son of Simon Os and Julie Goudberg. He married in Utrecht on 23 October 1889 to Rebecca Cohen, daughter of Abraham Cohen and Matje Kruijer. The couple had three children: Julia, who died in childhood, Matje Julia and Sara. Rebecca passed away before 1910 and Levij remarried to Jansje …
In addition, a Jokos file (number 34171) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.