Etymology

brannigan

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Irish Ó Branagáin
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brannigan · noun1

Bran(n)- refers to an ancient king of Wales, his name meaning "raven" in Old Welsh. His head is said to be buried under the Tower of London & is why, it is said, that ravens flock to it. "-igan" is an Anglicization of the Brythonic Gaelic surname suffix "-yggan" which means "descendant of".

Brannigan · proper noun2

  1. Irish · derived fromÓ Branagáin“descendant of Branagán”
  2. English todayBrannigan

Reduced Anglicized form of Irish Ó Branagáin (“descendant of Branagán”), a personal name derived from a hypocoristic form of bran (“raven”).

Etymology from Wiktionary, CC BY-SA 4.0.