 Jacob van Praag - LeonBorn 11-1-1866 Utrecht, Netherland, died 23-11-1942 Auschwitz-Katowice, Poland, 75 or 76 years. Occupation: Buyer, shipper. Son of Marcus Alexander van Praag and Rachel Leon - Toledo Married 15-2-1893 Amsterdam, Netherland (at most 29 years married) to:  Elisabeth Meijer - van StraatenBorn ± 1856 Beesd, Netherland, died before 1922. Daughter of Flip Mozes Meijer and Hendrijntje van Straaten | |||
| 2nd marriage Jacob van Praag - LeonMarried 17-6-1914 Amsterdam, Netherland (27 or 28 years married) to: Betje Meijer - van StraatenBorn 9 jul 1875 Beesd,Gelderland,Netherland, 1st marriage to: Philip Salomon Fransman - Goldsteen, 2nd marriage to: Jacob van Praag - Leon. Daughter of Flip Mozes Meijer and Hendrijntje van Straaten | |||
| 3rd marriage Jacob van Praag - LeonMarried 4-10-1922 Amsterdam, Netherland (19 or 20 years married) to: Rijna Lina Velmans - VoorzangerBorn ± 1865 Amsterdam, Netherland. Daughter of Joseph Isaac Velmans and Judic Levie Voorzanger | |||
| 4th marriage/ relation Jacob van Praag - LeonMarriage/ Related to: Louisa Croese - ColetBorn 6-11-1873 Amsterdam, Netherland, died 23-11-1942 Auschwitz-Katowice, Poland, 68 or 69 years, 1st marriage/ related to: Leman van Leer - van Leer, 2nd marriage/ related to: Jacob van Praag - Leon. Daughter of Eliazer Croese and Roosje Colet | |||