Hartog de Boer wa a son of Abraham de Boer and Jane Kurk. He married 27 June 1907 in Amsterdam to Mietje Bosboom, a daughter of Hartog Bosboom and Judith van de Kar.
The couple had two children: Abraham and Judith.
City Archive of Amsterdam, archive card of Hartog de Boer and Mietje Bosboom.