What does the name Morgan mean in french?

; Fata Morgana :

: 1818, lit. "Fairy Morgana," mirage especially common in the Strait of Messina, Italy, from Morgana, the "Morgan le Fay" of Anglo-Fr. poetry, sister of King Arthur, located in Calabria by Norman settlers. Morgan is Welsh, "sea-dweller." There is perhaps, too, here an infl. of Arabic marjan, lit. "pearl," also a fem. proper name, popularly the name of a sorceress. For the source and more detailed information concerning this subject, click on the related links section indicated below.