Ogwen, the, 130, [471], [472].

oian, [527].

Old Head of Kinsale, [632].

Oldcastle, 393.

Olfyn, 218.

Ollick ghennal, 337.

Olwen, 113, 114, [646], [647].

omnia mutantur, 353.

on, [630].

Onỻwyn, 255.