Gaskin. Originally Gascoigne (of Gascony. They were in Ireland in the 13th Century AD mainly in Northern Leinster where is Gaskintown in Co. Meath in the south - east of Northern Leinster.

Gatchell. A Quaker family who were in Co. Waterford in the south - east of the Munster Province.

Mac Gately - Irish / Mag or Mheic Athlaoich. A Sept / Family branch - who had their territory in Co. Roscommon in the east of the Connacht Province. See also - Keightley.

Gattins. See also - Gaitens.

O Gaughan. A Heremonian Ui Cobhthaigh Dal Cuinn 3 Colla Sept / Family branch. Ancestors - *84.Eochy / Echu "Doimhlen," *83,Cairbre "Liffeachair" the 116th King of Tara / Ireland, ,

O Gaughan - Irish / Ua Gaibhtheachain - gaibhtheach / anxious. Ua Gachain used now. A Heremonian Ui Cobhthaigh Dal Cuinn Ui Fiachrach Sept / Family branch,  who had their territory in the north of Co. Mayo in the mid - west of the Connacht Province. See also Gahan and Gavaghan. Ancestors - *87.Fiachra the original 2nd King of Connacht (Ui Fiachrach), *86.Eochy "Mugmedon" the 124th King of Tara / Ireland

Mac Gaughney - Irish / Mag Fhachtna. Changed to Mac Gaffney in Co. Longford in the north - west of Northern Leinster.

Gaule / Mheic an Ghaill - gall / foreigner (Descended from a son of the Foreigner) An Irish name adopted by a branch of the Stapletons, which see.

Gaule / of Gauletown. They were in Co. Kilkenny in the south - west of Southern Leinster and claimed to be a branch of the Burkes, which see.

Gault - gallda / foreign. They were in Co. Antrim in the north - east of the Ulster Province.

Mac Gauran. A Sept / Family branch, who had their territory in Co. Cavan in Southern Ulster where they were Kings. See also Mac Govern.

O Gaussen or O Gason - Irish / Ua Gusain - gus / action / vigour. A Sept / Family branch, who had their territory in the Connacht Province.

O Gavagan. A Sept / Family branch, who had their territory in Co. Sligo in the north - west of the Connacht  Province and nearby in Co. Mayo in the mid - west of Connacht.

O Gavaghan - Irish / Ua Gaibhtheachain - Gaughan. A Sept / Family branch, who had their territory in Co. Mayo in the mid - west of the  Connacht Province and nearby in Co. Roscommon in the east of Connacht.

O Gavan or O Gavin - Irish / Ua Gabhain - gabhadh / want. A Sept / Family branch, who had their territory in Co. Mayo in the mid - west of the Connacht Province.

O Gavan or O Gavin - Irish / Ua Gabhain / Ua Gaibhin. A Sept / Family branch, who had their territory in Co. Cork in Desmond / Des Mhumhain / Southern Munster.

Mac Gavan. A Sept / Family branch, who had their territory in Co. Longford in the north - west of Northern Leinster and Co. Mayo in the mid - west of the Connacht Province.

Mac Gavigan. Used as a synonym for Mac Geoghegan and Mac Guigan, which see, in Co. Dublin in the north - east of Southern Leinster and also for Mac Gaffigan.