From Wiktionary, the free dictionary
ur- + Vater
Urvater m (strong, genitive Urvaters, plural Urväter)
- ancestor, progenitor
- Synonym: Stammvater
- Coordinate term: Urmutter
Declension of Urvater [masculine, strong]
- “Urvater” in Duden online
- “Urvater” in Digitales Wörterbuch der deutschen Sprache