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First name origin & meaning:

Scottish: Victorious at sea

First name variations: Merdock, Merdok, Murdoch, Murdock, Murdok, Murdock

Last name origins & meanings:

  1. Irish: (Meath and Monaghan) Anglicized form of Gaelic Ó Muircheartaigh ‘descendant of Muircheartach’, a personal name from muir ‘sea’ + ceardach ‘skilled’, i.e. ‘skilled navigator’. A Kerry surname of the same form is Anglicized as Moriarty.
  2. Irish: (County Roscommon) Anglicized form of Mac Muircheartaigh (originally Anglicized as MacMoriarty) (see McMurtry).
  3. Irish: sometimes of Scottish origin, an alternative to Murdock.