Popularity of the last name by country

Ireland

• Cork (2,209)
• Waterford (1,741)
• Dublin (1,336)
• Wexford (1,310)
• Kerry (745)
• Tipperary (428)
• Limerick (419)
• Galway (404)
• Roscommon (350)
• Wicklow (343)
• Donegal (327)
• Offaly {Kings} (309)
• Meath (295)
• Clare (262)
• Kilkenny (205)
• Mayo (196)
• Westmeath (117)
• Cavan (112)
• Kildare (63)
• Monoghan (48)
• Leitrim (44)
• Louth (44)
• Carlow (39)
• Sligo (36)
• Leix {Queens, Laois} (21)
• Longford (13)

All countries

• France (71,173)
• United Kingdom (21,263)
• Ireland (14,180)
• United States (9,756)
• Canada (5,489)
• Germany (2,523)
• Netherlands (1,680)
• Australia (1,055)
• New Zealand (1,033)
• Italy (506)
• Switzerland (407)
• Belgium (298)
• Austria (229)
• Unknown country (216)
• Spain (213)
• Algeria (206)
• Argentina (104)
• Denmark (62)
• India (60)
• Réunion (53)
• Senegal (49)
• Sweden (35)
• China (33)
• Mexico (32)
• Uruguay (28)
• Estonia (25)
• Hungary (24)
• Norway (24)
• Viet Nam (24)
• Morocco (22)
• Colombia (20)
• Romania (19)
• Russian Federation (19)
• Slovakia (Slovak Republic) (19)
• Martinique (17)
• Guadeloupe (14)
• Poland (14)
• Finland (13)
• Czech republic (12)
• Haiti (11)

Origine of last name

BRIAN : 1: Irish and English: variant of <a href="https://en.geneanet.org/surnames/Bryant">Bryant</a>.2: Irish: shortened Anglicized form of Ó Briain see <a href="https://en.geneanet.org/surnames/O%27Brien">O'Brien</a>.3: French: unflattering nickname from Old Occitan brian ‘mite maggot’ by extension brimborion possibly denoting a very small man.