Lion Zegerius, a shoemaker by trade, was a son of Meijer Hartog Zegerius and Duifje Lap. He married Vogeltje Polak in Amsterdam on 1 July 1914, a daughter of Izak Polak and Judikje Veltman. The couple had no children.
Lion Zegerius was born into a family of ten children, of whom two have survived the Holocaust and one child died before the war in the Apeldoornse Bos. The other children, Hartog, Levie, Elisabeth, Michiel, Barend and Sophia have been killed all during the Shoah.
City Archive of Amsterdam, archive card of Lion Zegerius, family regstration cards of Lion Zegerius and Meijer Hartog Zegerius and the website www.wiewaswie.nl.