What does the Welsh word Betws mean?

Betws is thought to be a contraction of the Anglo-Saxon Bed Hus (modern: Bede House) = Prayer House, Church, Private Chapel or Oratory.

Betws -y- Coed = Prayer House in the Wood (Coed) or such a variant as Church/Chapel in the Wood/Trees.

Betwys -yn- Rhos = Church on the Moor (approx).