Kostelec Family History
Kostelec Surname Meaning
Slovenian: variant of Kostevc, a habitational name denoting someone from the Kostelsko region in Lower Carniola, named after the castle of Kostel.
Compare Costello, Kastelic, and Kostelac.
Croatian: habitational name for someone from Kostel, a place in northern Croatia.
Source: Dictionary of American Family Names 2nd edition, 2022
