Mac Gloughlin - Irish / Mag Lochlainn. Used as a variant for Mac Loughlin, which see.

Glover. English occupational origins. They were in Ireland in Medieval Times and are now in the Ulster Province.

Mac Glowry. A Heremonian Ui Cobhthaigh Dal Cuinn Colla da Crioch Airthir Ui Echdach Ui Echach Orior Siol Ciarain Ui nEchach Clann Ruadhagain Sept / Family branch, who had their territory in the north of Co. Armagh in the south - east of the Ulster Province and nearby in Co. Down. Especially see - Mac Glory,

O Glynn or O Glinn. A Heberian Dal gCais Ui Bloid Sept / Family branch, who had their territory in Thomond / Northern Munster. Especially see - O Glinn. 

Mac Glynn - Irish / Mag Fhloinn - flann / ruddy. A Sept / Family branch, who had their territory in Athlone in Co. Westmeath in the south - west of Northern Leinster. Now also throughout the Connacht Province and nearby in Co. Clare in the north - west of the Munster Province.

Glynn / de Glin. Welsh origins. Seldom in Ireland.

Goaley. They were in Co. Galway in Southern Connacht. See also - Gooley.

Goan. An Ulster Province variant for Gowan, which see, often changed to Smith, which see.

Godfrey. English origins. The Poul na Raha Priory in Co. Kerry in the south - west of the Munster Province was originally founded by Geoffrey de Marisco in 1215 AD on the Celtic Monastery of Killagla / Cill Acaro / The Church of the Field. After the Catholic Irish Institutions were suppressed, it and the land there were also given to his family with "No Irish allowed to buy or rent." It was later on taken over by Oliver Cromwell during his Invasion and given to this family and they are still there today.

Mac Godfrey or Mac Caffery - Irish / Mheic Gafraidh. A Heremonian Ui Cobhthaigh Dal Cuinn Colla da Crioch Siol Daim Argait (Ui Cremthainn) - Clann Lugainn Sept / Family branch of the  Maguires, which see, who had their territory in Co. Fermanagh in the south - west of the Ulster Province. Ancestors - *85.Murray / Muiredach "Colla da Crioch" / "Fo Crith" - of the Two Countries, *84.Eochy / Echu "Doimhlen," *83.Cairbre "Liffeachair" the 116th King of Tara / Ireland. Especially see - Mac Caffery.

Mac Godfrey. A Heremonian Ui Cobhthaigh Dal Cuinn Colla da Crioch Siol Daim Argait (Ui Cremthainn) Clann Lugainn Sept / Family branch of the Maguires, who had their territory in Co. Fermanagh in the south - west of the Ulster Province. Ancestors - *85.Murray / Muiredach "Colla da Crioch" / "Fo Crith" - of the Two Countries, *84.Eochy / Echu "Doimhlen," *83.Cairbre "Liffeachair" the 116th King of Tara / Ireland. Especially see - Mac Corry - Irish / Mheic Gothraidh.

Godwin. Used by the Heberian Dal gCais O Deas, which see, to anglicise their name, in the Connacht Province, but not in their original territory nearby in Co. Clare in the north - west of Thomond / Tuaisceart Mhumhain / Northern Munster. Ancestors - *91.Cas the King of Thomond.

Mac Goey. Used as a variant for Mac Gaughey, which see, in Co. Leitrim in Northern Connacht and nearby in Co. Longford in the north - west of Northern Leinster.

Mac Goff. Used as a synonym for Mac Geough, which see.

Gogan or Goggin. A later variant of Cogan, which see, used in Co. Cork in Southern Munster. Gogan also used in Co. Cork in the place names Gogan Rath and Goggans Hill / Knochgogan.

Mac Gogarty - Irish / Mag Fhogartaigh. A Sept / Family branch, who had their territory in Co. Meath in the south - east of Northern Leinster since the 11th Century AD. Use of the O / Ua is not correct as the O was introduced later incorrectly. Also not connected to Fogarty.

O Gohery or O Geoghery - Irish / Ua Gothraidh. From a Norse forename Gothfrith. A Sept / Family branch, who had their territory in the north of Co. Tipperary in Ormond / Aur Mhumhain / North Eastern Munster and nearby in Co. Offaly in the north - west of Southern Leinster. Some also changed to Godfrey and it was also confused with Mac Goffrey.

Mac Gohery. A Heremonian Ui Cobhthaigh Dal Cuinn Colla da Crioch Siol Daim Argait (Ui Cremthainn) Clann Lugainn Sept / Family branch of the Maguires, who had their territory in Co. Fermanagh in the south - west of the Ulster Province. Especially see - Mac Corry.

Golden or Goulding - Irish / Ua Goilin. A Sept / Family branch, who had their territory in Co. Cork in Desmond / Des Mhumhain /  Southern Munster.

Golden or Goulding. Also used to anglicize Mac Goldrick, which see - Irish / Mag Ualghairg. A Heremonian Ui Cobhthaigh Dal Cuinn Ui Briuin Breifne Sept / Family branch of the O Rourkes, who had their territory in the Ui Briuin kingdom of Breifne in Co. Leitrim in Northern Connacht. Ancestors - *87.Brion the original 1st King of Connacht (Ui Briuin), *86.Eochy "Mugmedon" the 124th King of Tara / Ireland.