I’ve never known the origin of my super uncommon last name, as the earliest ancestor I can trace lived in the midatlantic US in the early 18th century, but given how lovely it sounds when every Irish person says it, I’m convinced this is where it’s from. 🇮🇪
Maybe, can see two Kilgrove (note one L) marriages in England, both in locations noted for Irish diaspora - Mary in Liverpool 1848 but she is a widow, maiden name Farrell. Emma banns read at St Thomas, Stepney for marriage to Henry Edwards in 1884
Highly likely. Cill" (church/churchyard) or "Coill" (wood/woodland) both Gaelic/Irish words meaning Kil or Kill. Lots of villages and towns in Ireland with that prefix. Best of luck with your search.
Cyll (kill) means hill. Grove means a group of trees. Hope that helps.
I went there with my Mom in 2019. The library had a genealogist who helped us out. Enjoy!
A kill is a lake in German I think. Not sure but there are some areas in NYS.