Von Hase was born in Gut Wangern, Breslau, Kingdom of Prussia. That area is now in Wrocław, a city in western Poland. He was married to Renate Stumpff, the daughter of general Hans-Jürgen Stumpff. The couple had five children. Hase turned 100 in December 2017 and died in May 2021 at the age of 103.