Okker, George Godschalk
Okker, Simon (birth 31 May 1890 Amsterdam - died 20 Mar 1943 Sobibor)
Oldenhof, Johannes Coenraad
Oldenhof, Metta Johanna (birth 9 Mar 1915 Den Haag - died 24 Sep 1959 Den Haag)
Ooms, P.