Urnach, [507], [564], [565].

Urogenonertus, [580].

urus, the, [579]–81.

Usk, the, [518].

uwchwynt, yr, [596].

uzon, [626].

v = Welsh f, 2.

vates, [616].

Vaughan the antiquary, [491].

vel p’agh sthie, 349.