 Leendert Jan van HelvoortBorn 1857 Brakel, Netherland. Occupation: Engineer Married 5- mar 1886 Poederoijen, Netherland to:  Rozetta Bernard Frank - NotenboomBorn 1859 Brakel, Netherland. Daughter of Bernard Salomon Frank - Beer and Roosje Andries Notenboom - de Jong | |||