Origin of the name Merlin: English cognate of the Welsh Myrrdin, a name derived from the Primative Celtic elements mer, mori (sea) and dunom (hill, fortress), therefore meaning "sea hill" or "sea fortress." The name was most famously borne in Arthurian legend by the magician helper and guide of King Arthur.
Mathilda (sometimes spelled Matilda) is a female name, of Germanic Gothic derivation, derived from words corresponding to Old High German "maht" (meaning "might, strength") and "hild" (meaning "battle").
The meaning of the name “Gwenddydd†is: “White dayâ€. Categories: Celtic Names, Welsh Names. Used in: Welsh speaking countries.
The Meaning of Myrddin. Originally Merlin, the meaning of the Welsh name Myrddin is Hawk or Sea Fort, from The Sea Fortress.