The name Marlon is a French baby name. In French the meaning of the name Marlon is: Little falcon.
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.