Cill Seanchua — the church of Seanchú — is the name that stuck. Who exactly Seanchú was, the records don't say with any certainty. The word seanchú means old hound, though whether that was a nickname or a title is long gone. What remains is the name, a modern Catholic church on the R402, and about a square kilometre of north Kildare townland midway between Enfield and Carbury.
This is bog-edge country: flat, wide, agricultural. The Bog of Allen is the backdrop to the north-west; the Royal Canal runs through Enfield a few kilometres east. Kilshanchoe itself is a crossroads — the kind of place you pass through on the way to somewhere else and then remember, later, that you passed through it. That's not a failing. Most of the island is made of places like this, and they're worth knowing by name.
On the R402, roughly 5km west of Enfield and 4km east of Carbury. Clane is about 15km south via local roads. No public transport serves the crossroads directly.
Nearest Bus Éireann services stop at Enfield (routes 23 and 23a from Dublin). From there it's a 5km drive or cycle west on the R402.