Where your folk
came from

Jack
Often from the French Jacques and recorded in west Ulster areas of Tyrone and Donegal.
Jackman
English and most frequently seen in Kilkenny and Waterford.
Jackson
English and regularly seen throughout the 32 counties.
Jacob
Mostly from an English family who settled in Wexford 300 years past.
Jago
From Cornwall. Found in Cork. In Roscommon and Longford linked to Hanley. See Igoe.
James
Usually Welsh, the odd occasion from MacJames or Fitzjames. Quite common.
Jameson
Scottish and common in Ulster and Dublin.


Jeffers
English and a long time associated with such counties as Cork, Clare and Dublin. Regularly crops up in Ulster.
Jennings
Of Viking origin via Jen or Jan. Seen in south Ulster, north Leinster. Mayo-Galway sept were a branch of the Burkes.
Johnson
Both Scottish and Irish origin. Ulster holders of the name are usually Scottish. Further south a translation of MacShane.
Johnstone
English and common enough.

Jolley
Or Joly and Jolly. From the French Joliffe. See Dublin.
Jones
Welsh origin and very popular throughout.
Jordan
Long time connection to Mayo.
Jory
A variant of Joyce in Connacht but French origin in Kerry and Waterford.

Joyce
Originally Welsh but become completely hibernicised and grew to become one of the Tribes of Galway.
Judge
Connected to Breheny. One popular Drogheda family have contributed much to the welfare of the Boyneside town. See Galway.