Gaskin. Originally Gascoigne (of Gascony who 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. Heremonian Ui Cobhthaigh Ui Felim Dal Cuinn 3 Colla Sept / Family branch. Ancestors: 87.Eochy / Echu Doimhlen, *86,Cairbre Liffeachair the 117th King of Tara / Ireland,

O Gaughan - Irish / Ua Gaibhtheachain / gaibhtheach (anxious). Ua Gachain used now. Heremonian 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: 90.Fiachra the second Dal Cuinn King of Connacht ancestor of the Ui Fiachrach Sept, *89.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) in Co. Kilkenny in the south - west of Southern Leinster and claimed to be a branch of the Burkes, which see.

Gault - gallda (foreign) in Co. Antrim in the north - east of the Ulster Province.

Mac Gauran or Mac Guaran. A Sept / Family branch, who had their territory in Co. Cavan in Southern Ulster where they were Kings. Especially see 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 Des Mhumhain / Desmond / Southern Munster. See also O Garvin.

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.

Mac Gaw. Used as a variant for Mac Caw, which see, in the Ulster Province and a branch of the Scottish Clan Mac Farlane.

Gaynard. Anglo - Norman origins in Co. Galway in Southern Connacht in the 13th Century AD and later in Co. Mayo in the mid - west of the Connacht Province.