Hijman Oudkerk, born on 16 July 1870 in Den Helder, was a son of Gerrit Oudkerk and Henriette Jacobson. Like his father who was a slaughterer, Hijman also worked in the slaughterhouse and became a butcher by profession. He moved in June 1875 with his parents from Den Helder to Amsterdam, where they came to live at Zeedijk 67. Ten years later, in June 1885 after having moved, the Oudkerk family liv…