Where does “Merlinus” come from?

Merlinus (Medieval Latin) comes from Old French Merlin, from Old Welsh Myrddin, from Proto-Indo-European mori- — marsh, lake, sea; sea.

Ancestry of “Merlinus”, step by step

StepLanguageWordMeaning
1Old FrenchMerlin—
2Old WelshMyrddin—
3Proto-Indo-Europeanmori-marsh, lake, sea; sea

Words derived from “Merlinus”

Every word from Proto-Indo-European mori- →Every word from Old Welsh Myrddin →Every word from Old French Merlin →