When Hans August Grondei was born on 24 June 1897, in Silesia, Prussia, Germany, his father, August Grondei, was 26 and his mother, Maria Bertha Anna Burkert, was 36. He married Martha Gassner on 14 April 1929. They were the parents of at least 1 son. He died on 15 February 1943, in Ober Leisersdorf, Goldberg-Haynau, Liegnitz, Silesia, Prussia, Germany, at the age of 45.
Pet form of Johannes .