Byson, n. a finger ring, a ring
Bystwn, n. a whitlow
Byswain, n. a thimble
Byth, n. eternity: adv. for ever
Bytheuad, n. a hound
Bytheuadgi, n. a hound dog
Bythfyw, a. ever-living
Bythol, a. eternal, perpetual
Bytholrwydd, n. everlastingness
Byw, v. to live, to exist; a. alive, living, quick