Olthoff, Ank
Olthoff, Carla
Olthoff, Ferdinand Allart
Olthoff, Johannes
Olthoff, Mariette
Ourhaan, Cato (birth 25 Jul 1895 Amsterdam Holland - died 16 Jul 1930 Amsterdam Holland)
Ourhaan, Israel (birth ± 1864 - died Dec 1935 Amsterdam Holland)