Gyz Zempln, born on October 17, 1879 in Nagykanizsa, Hungary, was the Hungarian father of Gyz and Joln.
Gyozo Zemplen (17 October 1879  29 June 1916) was a Hungarian physicist who worked in the fields of hydrodynamics and the kinetic theory of gases. Gyozo Zemplen was born in the town of Nagykanizsa, Hungary. Gyozo, Jolan Hungarian 
