Släkthistoria för Carefull
Carefull Vad efternamn betyder
anglicized form of Manx Caralagh from Gaelic *Mac Cearbhallach (from a personal name possibly based on Gaelic cearbh ‘stag’). According to Kneen the palatalization of the medial -o- in names such as Carrolly ‘led to the idea that the correct form was Kiarailagh (or Carailagh derived from an English loan word care) and this was later translated Careful.’
Källa: The Oxford Dictionary of Family Names in Britain and Ireland, 2016
