Greenaway. English locative origins (Dweller by the green.) Descended from Henry Greenaway who was an Oliver Cromwell Commissioner, who had settled in Co. Galway in Southern Connacht. They were in Ireland in the Mid - 17th Century AD, and are now in the Ulster Province were Greenhay is used as a variant.

Mac Greer. Scottish origins. Used as a variant for Mac Gregor. Gaelic / Mag Grioghar. They have been in the north of the Ulster Province since the Confiscation of the 3,500,000 acres of the Heremonian Ui Cobhthaigh Dal Cuinn "Northern" Ui Niaill territories and the non - Catholic Plantations there.

Greeves (thicket or grove). English origins. They were in the Ulster Province. See also - Graves.

Mac Greevey. A Heremonian Ui Cobhthaigh Dal Cuinn Colla da Crioch Airthir Ui Niallain Clann Cernaich Sept / Family branch, who had their territory at Oneilland East and West, in Co. Armagh in the south - east of the Ulster Province. Especially see - Mac Reevy.

Mac Greevy - Irish / Mag Riabhaigh - riabhach / grey or brindle. A Heremonian Ui Cobhthaigh Dal Cuinn Ui Briuin Sept / Family branch, who had their territory in Co. Roscommon in the north - east of the Connacht Province, who were the Kings of Moylurg. See also Mac Areevy and Mac Creevy. Ancestors - *87.Brion the King of Connacht (Ui Briuin), *86,Eochy "Mugmedon" the 124th King of Tara / Ireland.

Mac Gregan - Irish / Mag Riagain. A Sept / Family branch, who had their territory in the east of the Leinster Province. See also Cregan. No connection to Grehan.

Gregory. English origins. They were in Co. Kerry in the south - west of the Munster Province in the 17th Century AD, and were later at Coole in Co. Galway in Southern Connacht.

O Grehan or O Greaghan - Irish / Ua Greachain. A Sept / Family branch, who had their territory in the Connacht Province, and nearby in Co. Westmeath in the south - west of Northern Leinster. Variants used were Graham, Grayhan and Grimes, except in Co. Tyrone in Central Ulster, where it is used as a substitute for O Gormley, which see.

O Grennan or O Grennon - Irish / Ua Grianain - grian / Sun - grianach / sunny. A Sept / Family branch, who had their territory in Co. Mayo in the mid - west of the Connacht Province, and were also in Co. Offaly in the north - west of Southern Leinster, and also nearby in Northern Leinster. No connection with Grannon.

O Grennan - Irish / Ua Grianain - grian / Sun. A Sept / Family branch, who had their territory in Co. Monaghan in Southern Ulster. No Connection to Grannon.

O Gribben - Irish / Ua Gribin. A Sept / Family branch, who had their territory in Co. Down and nearby in Co. Armagh in the south - east of the Ulster Province.

Mac Gribben. Used as a variant for Mac Cribben, which see. - Irish / Mheic Roibin. A Connacht Province name Mag Roibin is used in the Ulster Province. Mac Robin is also used as a synonym.

O Grieve or O Griffen - Irish / Ua Griobhthain -

O Griffin or O Griffey - Irish / Ua Griobhtha / dangerous or Griffin like. Griffin has superseded the earlier Griffey. A Sept / Family branch, who had their territory at Ballygriffy in Co. Clare in the north - west of Thomond / Tuaiscert Mhumhain / Northern Munster. Ancestors - *91.Cas (Dal gCais) the King of Thomond, *85.Cormac "Cass," *84.Ailill "Oluimm" the 1st King of Munster.

O Griffin. A Sept / Family branch, who had their territory near Kenmare at Ballygriffin in Co. Kerry in the south - west of Iar Mhumhain / South Western Munster, but were also nearby in Co. Cork in Desmond / Des Mhumhain / Southern Munster.

Griffith - Irish / Ua Griobhtha. A Welsh name, used synonymously with Griffin in Co. Kilkenny in the south - west of Southern Leinster.

Mac Grillan or Magrillan - Irish / Mag Riallain. An Ulster Province name, formed from Niall substituting R for N.

Grimley. Used as a variant for Gormley in Co. Armagh in the south - east of the Ulster Province.