Mabel
Mabel is an English female given name derived from the Latin amabilis, "lovable, dear".
Amabilis of Riom (d. 475) was a French male saint who logically would have assumed the name Amabilis upon entering the priesthood: his veneration may have resulted in Amabilis being used as both a male and female name or the name's female usage may have been initiated by the female saint Amabilis of Rouen (d. 634), the daughter of an Anglo-Saxon king who would have adopted the name Amabilis upon becoming a nun.