What is "kvaternik"

Kvaternik is a surname. Notable people with the surname include:

• Dido Kvaternik (1910–1962), also Eugen Dido Kvaternik, Croatian Ustaše General-Lieutenant, son of Slavko Kvaternik
• Eugen Kvaternik (1825–1871), Croatian nationalist politician
• Slavko Kvaternik (1878–1947), Croatian military commander, one of the founders of Ustaše, father of Dido Kvaternik and brother of Petar Milutin Kvaternik
• Petar Milutin Kvaternik (1882–1941), Croatian politician, brother of Slavko Kvaternik