O Callagy - Irish / Ua Calgaigh. A Sept / Family branch, who had their territory in Co. Sligo in the north - west of the Connacht Province. They were also in Co. Galway in Southern Connacht.

O Callahan - See O Callaghan.

O Callan - Irish / Ua Cathalain. A Heremonian Ui Cobhthaigh Ui Felim Dal Cuinn 3 Colla Sept / Family branch, who were descended from a King of Fearnmag, who had their territory in their kingdom of Orghialla / Oriel in Co. Monaghan in Southern Ulster and Co. Louth in the north - east of Northern Leinster. Not connected to O Cahalane, but can sometimes be a toponymic derivation. Ancestors: *84.Eochy / Echu "Doimhlen," *83.Cairbre "Liffeachair" the 116th King of Tara / Ireland, *80.Conn of the Hundred Battles the 110th King of Tara / Ireland (Dal Cuinn).

O Callan - Irish / Ua Cathalain. A Sept / Family branch, who had their territory in Co. Kilkenny in the south - west of Southern Leinster.

Mac Callan. Used as a variant for Mac Callion, which see, in Co. Fermanagh in the south - west of the Ulster Province. Sometimes also changed to Collins there.

Mac Callery. May be a variation used by some of the Irish - Mac Gallerys, which see, in the Connacht Province, whose original territory was in Co. Clare in the north - west of Thomond / Tuaiscert Mhumhain / Northern Munster.

Mac Calilly or Mac Callilly or Mac Callely. Used as variants originally for Mac Alilly. Especially see - Mac Lilly.

O Callinan - Irish / Ua Callanain. A Heberian Eoghanacht Sept / Family branch, who were physicians to the Mac Carthys who had their territory in Co. Cork in Southern Munster. Ancestors: *85.Eoghan "Mor" (Eoghanachta), *84.Ailill "Oluimm" the 1st King of Munster.

O Callinan. An Erenagh Sept / Family branch, who had their territory in Co. Galway in Southern Connacht.

Mac Callion. Gaelic Irish / Mheic Cailin. A galloglass / mercenary family who were with the Heremonian Ui Cobhthaigh Dal Cuinn "Northern" Ui Niaill Ui Conaill O Donnells at Ballymacallion in Co. Derry and Co. Donegal in Northern Ulster. See also - Mac Campbell and Mac Callan.

Callow. English name / calu - bald. Cognate with the Irish - Calvey, which see.

Mac Calmont. Highland Scottish origins. A  Gaelic Sept / Family branch, of the Clan Buchanan who have been in Co. Antrim in the north - east of the Ulster Province since the 17th Century AD after the Confiscation of the 3,500,000 acres of the Heremonian Ui Cobhthaigh Dal Cuinn "Northern" Ui Niaill territories there, and the Foreign non - Catholic Plantations there. See also - Mac Colman.

Calter. Used as a variant for Colter, which see. They were in Co. Armagh in the south - east of the Ulster Province.

Mac Calvey or Mac Calway - Irish / Mheic an Chalbhaigh - calbhach. A Sept / Family branch, who had their territory in Co. Mayo and Co. Sligo in the west of the Connacht Province. Also used as a synonym for Mac Kelvey, which see.

Camac -

                                                                                +On to Cambridge - Mac Canny