Another submission is the name comes from Mynyddog Mwynfawr, a character in an early Welsh poem. Use of an adopted Welsh-language pseudonym or bardic name (ffug enw) is common among Welsh poets.
A different entry originates from the character Mynyddog Mwynfawr in an ancient Welsh text. The use of a Welsh language pseudonym or bardic name (ffug enw) is common practice for Welsh poets.