David Bromet was a son of Barend Bromet and Sara Koster. He married Naatje Barmhartigheid on 8 June 1904 in Amsterdam, a daughter of Isaac Barmhartigheid and Saartje Pierotto.
The couple had six children: Aron, Rebecca, Klara, Barend, Izak and Sara (who has survived the Holocaust).
City Archive of Amsterdam, family registration card of David Bromet and website www.wiewaswie.nl.