Beard / Barbe. They were in Co. Laois and Co. Dublin in the north of Southern Leinster and in Co. Waterford in the south - east of Ormond  / North Eastern Munster in the 16th Century AD. Also occasionally used as a variant for Baird, which see.

O Beary - Irish / Ua Beara. A Heremonian Ui Laoghaire Ui Lughaidh Cu Corb Dal Niad Cuirp Ui Failge Sept / Family branch, of the O Dempseys, which see, who had their territory in Co. Offaly in the north - west of Southern Leinster. Ancestors: *91.Rossa "Failgi" (Ui Failge), *90.Cathair "Mor" the 109th King of Tara / Ireland, *86.Cu "Corb."

Beasley / Beaslaoi. English toponymic origins. The were from Lancashire and were in Ireland in the Mid - 17th Century AD.

O Beasty - Irish / Ua Biasta. A Heremonian Ui Cobhthaigh Dal Cuinn Sept / Family branch, who were descended from a King of Connacht. and had their territory in Co. Mayo in the mid - west of the Connacht Province.

Mac Beatty - Irish / Mheic Biataigh - biadhtach. A Sept / Family branch, whose territory was near Athlone in Co. Meath in the south - east of Northern Leinster. See also Beatagh and Betagh.

Beatty / Baty / Bartholomew. Scottish origins. The came from Galloway after 1603 AD during the Confiscation of the 3,500,000 acres of the territory of the Heremonian Ui Cobhthaigh Dal Cuinn "Northern" Ui Niaill Septs there, and the Foreign non - Catholic Plantations there, and were in Co Fermanagh in the south - west of the Ulster Province.

Becher / beech tree. They were "Landed Gentry," who have been in Co. Cork in Desmond / Southern Munster since the end of the 16th Century AD.

O Beck or O Beaky or O Beakey or O Bakey - Irish / Ui Beice. A Heremonian Ui Cobhthaigh Dal Cuinn Colla da Crioch  Ui Meith Macha (Ui Meith Tire Sept / Family branch, who had their territory in Co. Monaghan in their kingdom of Oirghialla / Oriel in Southern Ulster and adjacent territory in Co. Louth in the north - east of Northern Leinster. Now found in the north of Co. Louth and nearby in Co. Armagh in the south - east of Ulster Province where they were Chiefs. Kinsmen to the O Hanratty or O Hanraghty / Ui hInnreachtaigh / Ua hAnrachtaigh / Ui Seaain (Ui Ainfeith) Ui Meath Mara (Omeath). O Garvey / Ui Gairbhith, O Hanvey / O Hannay / O Hanney / Ui hAinfeith, O Horish / O Horisky / O Houriskey / O Whoriskey / Waters / Caldwell / Ui hUarghuis, O Marron / O Marran / O Marrane / O Marren / O Mearn / Ui Mhearain, O Mulready / O Mulbreedy / O Mulbride / O Mulreedy / O Murready / O Mulreddy / Ui Mael Brighdhe, O Smollen / O Smullen / Ui Smollain. Ancestors: *107.Imar, *106.Murtough / Muirchertach, *105.Dubhdarach, *104.Scannlan, *103.Indrechtach, *102.Gairbidh, *101.Ainbhith, *100.Mael "Brigte, *99.Duibinnracht, *98.Teague / Taidg, *97.Innreachtach, *96.Murray / Muiredach, *95.Mailimuchair, *94.Scannlan, *93.Fingin, *92.Aedha, *91.Fiachrach, *90.Fiachrach, *89.Eogan, *88.Brion, *87.Murray / Muiredach "Meith" (Ui Meith),*86.Imchada, *85.Murray / Muiredach "Colla da Crioch / Focrith - of the Two Countries,"  *84.Eochy / Echu "Doimhlen," *83.Cairbre "Liffeachair" the 116th King of Tara / Ireland.

O Beck or O Beaky or O Bakey - Irish / Ui Beice. An Irian Cruithin Ui Beann Traidhe Sept / Family branch, who were kinsmen to the O Cogley / O Kegley / Ui Coigligh, O Coskry / O Cosgry / O Coskerry 'O Cosgrave / Ui Cosgraigh, O Buggy / O Buggey / O Boggy / Ui Bogaigh, O Clooney / O Cloney / Ui Cluainaigh. Ancestors: *Cilline, *Dochartach, *Eoin, *Feromuin, *Aildine, *Oirenn, *Magach, *Kelly / Cellach "Croto," *Nechta, *Lugna, *Inomuin, *Benta (Ui Benntraige), *Conor / Conchobar, *Nessa, *Mail, *Formail, *Sirnae, *Forich, *Rochada, *Clothnai, *Coirbb, *Sethrann, *Loga, *Cethnenn, *37.Ir (Irians).

Beck. English origins. They have 4 derivations. They were in Ireland in Mediaeval Times and are now mainly to be found in the Ulster Province.

Beckett. French English origins. They were in Ireland in the 14th Century AD and became established in the 15th Century AD in the Leinster Province, and are now in the north of the Ulster Province, and in Co. Dublin in the north - east of Southern Leinster.

O Beegan. Used as a variant for O Behan, which see, in Ballinasloe in Co. Galway in Southern Connacht.

Begg or Begge - beag / small. Norman origins. They were in the Leinster Province, and were originally known as Bueg in Co. Cork in Desmond / Southern Munster, and as Beggs in the Ulster Province. Also used as a variant for Bigge - English.