Mac Crinion - Irish / Mheic Crionain. A Sept / Family branch, who had their territory in Co. Meath in the south - east of Northern Leinster.

Mac Crinion. May also be a variant of Crennan - Irish / Ua Crionain, which see.

Mac Crink. Highland Scottish origins in the south of Co. Down in the south - east of the Ulster Province.

O Criocan. A Sept / Family branch, who had their territory in Co. Tyrone in Central Ulster where they were Chiefs.

O Criodan. A Sept / Family branch, who had their territory in Co. Derry in the north - east of the Ulster Province.

Crisham. Used as a synonym for Clisham, which see, who were also in Co. Galway in Southern Connacht.

Croe -

O Croffy - Irish / Ua Crabhthaigh - craibhtheach (religious). A Sept / Family branch, who had their territory in the east of Co. Galway in Southern Connacht.

Crofton. English toponymic origins in the Connacht Province in the 16th Century AD, and were connected to The O Connor Don, and were staunch supporters of the Irish Catholic cause.

Mac Croghan - Irish / Mheic Conchruachan. A Sept / Family branch, who had their territory in Co. Roscommon in the east of the Connacht Province.

Mac Crohan - Irish / Mheic Criomhthainn (fox). Heberian Eoghanacht Chaisil Sept / Family branch of the O Sullivans who had their territory near the Dingle Peninsula and Blasket Islands in Co. Kerry in the south - west of Des Mhumhain / Desmond / Southern Munster. Ancestors:  84.Ailill Oluimm the Heberian 1st King of Munster, 85.Eoghan Mor (Eoghanachta), 86.Fiachu Mullethan the 1st King of Southern Munster and 3rd King of Munster, 87.Ailill Fland Bec, 88.Lewy / Luigthech, 89.Conall Corc the 1st King of Cashel / Munster ancestor of the Chaisil Septs, 90.Nad Froich the 2nd King of Cashel / Munster, 91.Angus / Oengus mac Nad Froich the 3rd King of Cashel / Munster,  92.Felim / Fedelmid the 4a King of Cashel / Munster, 93.Criffan / Crimthann, 94.Aed Dub, 95.Fingin mac Aeda the Eoghanacht Chaisil 9th King of Cashel / Munster,

Croker. In Co. Kilkenny in the south - west of Southern Leinster, and later in Co. Limerick in the mid - north - west of Thomond /  Northern Munster since the early 17th Century AD.

Croker / le Crocker (maker of pots). Anglo Norman origins in Ireland in the 13th Century AD.

O Crolly or O Croly or O Crole or O Crowley or O Campion or Hardy or Lake or Locke or Poole / Irish / Ua Cruaidh - loca. Heremonian Dal Cuinn Ui Brian Ai Sept / Family branch who were kinsmen to the Mac Dermots. Peter O Neill Crowley who had been born in May 1832 AD at Bally Macoda in Co. Cork in Southern Munster became a Fenian as his uncle, Peter O Neill a priest had been flogged at Cork in 1798 AD. In 1867 AD he formed a resistance group under Captain Mac Clure and besieged Knockadoon an English coastguard station, and then hid out with his group in Kilclooney Woods in Co. Cork until they were attacked and defeated by the British Military, and he died a few hours later at Mitchelstown and his body was interred at Bally Macoda.Ancestors: 112.Teague, 113.Dermod, 114.Sioda, 115.Dermod Cruaidh - loca - the Hardy Champion the direct male line ancestor of the O Crollys / Ui Cruaidh - loca, 116.Mac Craith, 117.Rory O Crolly, 118.Aodh O Crolly, 119.Lochlan Mor O Crolly, 120.Lochlan Oge O Crolly, 121.Ranal O Crolly, 122.Connor O Crolly, 123.David O Crolly, 1254.Donough O Crolly, 125.Dermod O Crolly, 123. Awley / Amhailgadh O Crolly.   

Mac Croly or Mac Crolly or Mac Crilly Heremonian Dal Cuinn Colla Da Crioch Cenel Rochada Fernmag / Fer Fermaighe / Farney Sept / Family branch who had their territory at Farney in Co. Monaghan in Southern Ulster in the kingdom of Orghialla / Oriel in Southern Ulster. Especially see Mac Crilly, Also used for Crowley, which see, in the Munster Province.

Cromie or Crombie. Scottish toponymic origins in Co. Armagh and in the south of Co. Down in the south - east of the Ulster Province.

O Cromy - Irish / Ua Cromtha - crom (bent). A Sept / Family branch, who had their territory in Co. Armagh in the south - east of the Ulster Province. Cromie and Crombie may have also been used.

O Cronan or O Cronin - Irish / Ua Cronain - cron (brown). O Cronan a variant for O Cronin, which see, in Co. Tipperary in the north - east of Aur Mhumhain / Ormond / North Eastern Munster.

O Cronekan - Irish / Ua Cronmhachain. A Sept / Family branch, who had their territory at Youghal in the east of Co. Cork in Des Mhumhain / Southern Munster.

O Cronelly or O Cronley - Irish / Ua Cronghaile - cron (brown) gal (valour). Heremonian Dal Cuinn Colla Da Crioch Ui Maine Sept / Family branch, who had their territory in the Connacht Province, and later nearby in Co. Offaly in the north - west of Southern Leinster. Ancestors: *86.Cairbre Liffeachair the 117th King of Tara / Ireland, 87.Eochy / Echu Doimhlen, 88.Murray / Muireadach Colla Da Crioch - of the Two Countries,

O Cronin or O Cronan / Irish / Ua Cronain. Heberian Sept / Family branch. Ancestors: 94.Aodh Dubh the father of 95.Carbery who was a younger son and the father of 96.Conor Clarenach the father of 97.Salbhuidhe the father  of 98.Duibhlaing whose brother 98.Flaithniadh is the direct male line ancestor of the Ui Flaithniadh Sept, and the father of 99.Ealathach Ard whose brother 99.Flaithimh is the direct male line ancestor of the Ui Flaithimh Sept, and another brother 99.Flan who is the direct male line ancestor of the Heberian O Flynns / Ui Flainn, and the father of 100.Ealathan the father of 101.Maoluir the father of 102.Cronan his fourth son who is the direct male line ancestor of the O Cronans / Ui Cronain whose brother, 102.Cathalan is the direct male line ancestor of the Ui Cahalan Sept and another brother, 102.Buadhach is the direct male line ancestor of the O Beddys. while another brother, 102.Maolin is the direct male line ancestor of the Ui Maolin Sept. 

O Cronin or O Cronan - Irish / Ua Croinin - cron (brown / swarthy). Gaelic Ithian Corca Loigde / Ui Luighe Erenagh Sept / Family branch, who had their territory at Clonakilty and Goughane Barra in Co. Cork in Des Mhumhain / Desmond / Southern Munster, and were also in Co. Kerry in the south - west of Desmond. Ancestors: 36.Lewy / Lughaidh, 35.Ith (Ithians).

O Cronnelly - Irish / Ua Conaille. Gaelic Milesian Irian Sept / Family branch. When the Ulster Province was subdued by the English Galls with great slaughter and violence in 1177 AD one of their Irian Chiefs was given over as a hostage to De Courcy the Anglo Norman Baron and he was sent to England where he became the ancestor of the Cranleys. Later a member of this Family became a Carmelite friar who was appointed the Archbishop of Dublin by Richard 11 and he came back to Ireland in 1398 AD and was also appointed Lord Chancellor by Richard 11 and was then sent over to the Continent and died later on at Farrington in England on 25/5/1417 AD and was interred at Oxford. Ancestors: 92.Connall the ancestor also of the Mac Guinness, 93.Cu Uladh born 576 AD, 94.Cu Sleibhe, 96.Conal, 97.Fergus, 98.Bresail, 99.Kenneth / Cinaeth, 100.Niall, 101.Buan, 102.Culenain direct male line ancestor of the O Cullens / Ui Cullenan, 103.Cronghall who died in 935 AD, 104.Kenneth, 105.Matudan who was slain in 995 AD the Prince of Crich Cualgne, 106.Cronghall, 107.Rory, 108.Angusliath, 109.Connall, 110.Brian Roe, 111.Gillananeev, 112.Cu Uladh, 113.Kenneth, 114.Gilla Chriost, 115.Eoghan, 116.Cathal, 117.Eoghan, 118.Eoghan Oge - the Younger, 119.Brian, 120.Cosgriadh, 121.Eoghan, 122.John the Prior, 123.Gillachriost, 124.Donnell, 125.Teague / Tadhg, 126.Richard, 127.Donnell Buidhe was an officer in Charles 1st's army  and was in the Battle of Edgehill in 1642 AD, and Marston Mor 1654 AD in Stuart defeat and returned to Killeenan in Rahasane in Co. Galway in the Connacht Province and died there in 1659 AD and was interred in Kileely Church now a ruin were he was covered by an oblong stone slab, 128.Donnell, 129.Teague, 130.Teague, 131.Richard / Riocaird, 134.Teague, born 1804, 135.Richard F. O Cronnelly.

Cronogue / Cronog or Crowley. They were in Co. Leitrim in Northern Connacht,

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