Henri Snijtselaar was a son of the in 1908 in Anderlecht deceased Samuel Snijtselaar and Sientje van Straten. In Den Haag he lived at the same address as his mother and his aunt Betje van Straaten. The address in Utrecht at Wolvenplein 27, was a penitentiairy where Henri obviously stayed.
Municipal Archive of Rotterdam, family registration card of Sientje van Straten.
Biography