Well, then.

Today's duo lesson: place names!

Abergwaun = Fishguard
Caergybi = Holyhead
Drenewydd = Newtown (and I already know newydd/new)
Casnewydd = Newport
Pwllheli = Pwllheli

...

*squints at list*

*sings softly, "one of these things is not like the others..."*