Etymology

Lonergan

L1O1N1E1R1G2A1N1

Today it means: A surname from Irish. Full definition →

Irish Ó Longargáin
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The story

  1. Irish · derived fromÓ Longargáin“descendant of Longargán”
  2. English todayLonergan

Reduced Anglicized form of Irish Ó Longargáin (“descendant of Longargán”), a personal name based on lonn (“strong”) + garg (“fierce”) + -án.

Etymology from Wiktionary, CC BY-SA 4.0.