Clara Hammelburg was a daughter of Abraham Salomon Hammelburg and Betje Jacob Speijer. At the age of 18, she married the 19-year old Jacob Houtkruijer on 12 December 1877 in Amsterdam, a diamond polisher and pedlar, a son of Joseph Simon Houtkruijer and Beletje Isaac de Leeff.
Clara’s first husband Jacob Houtkruijer was enrolled 12 March 1878 for military service and incorporated in the 7th Regime…