O Larkin - St. Laurence 

O Larkin - Irish / Ua Lorcain - lorc / rough or fierce. A Heremonian Ui Cobhthaigh Ui Felim Ui Eochaidh Fotharta Sept / Family branch, who had their territory in Co. Wexford in the south - east of Southern Leinster where they were the Kings and Chiefs of Fothart. Ancestors - *85.Setna, *84.Artt "Corp," *83.Cairbre "Niad," *82.Cormac "Mo," *81.Aengus "Mend / Mind," *80.Eochy / Eochaidh "Find Fuath nAirtt," (Ui Eochaidh), *79.Felim / Feidlimid "Reachtmhar" the 108th King of Tara / Ireland (Ui Felim), *78.Toole / Tuathal "Teachtmhar" the 106th King of Tara / Ireland. 

O Larkin / Ui Lorcain, A Heremonian Ui Cobhthaigh 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 / Airghialla / Oriel. Ancestors - *107.Lethlobar, *106.Fogartach, *105.Murray / Muiredach, *104.Laidgnen, *103.Fogartach, *102.Duncan / Donncuan, *101.Fogartach, *100.Ruadrach, *99.Maoilfothartaigh, *98.Artrach, *97.Aitheachda, *96.Mailduib, *95.Maoilfothartaigh, *94.Cronan, *93.Fergus, *92.Nadsluaig, *91.Cairpre "Daim Argait," *90.Eochy / Echach, *89.Criffan / Crimthainn "Leith" / "Lethan," *88.Feicc, *87.Dega "Duirn," *86.Rochadh / Rochatha, *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 Larkin or O Lorking or O Lorcan or O Lorcayne or O Lurkan or O Lurkayne - Irish / Ua Lorcain. 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 and the adjacent country in Co. Monaghan in Southern Ulster where they were  the Chiefs of Farney and West Ui Breasail. Kinsmen to the O Hanlons / Ui hAnluain, Mac Alindon / Mheic Gilla Fhiondain, O Carney / O Carny / Ua Cearnaigh, Mac Conkeel / Mac Enhill / Woods / Mheic Concaille, O Furey / O Fury / Ua Foirredh, O Herane / Ua hUidhrin, O Hare / O Hair / O Haire / Ua hEoir, O Hagan / O Hegan / O Eakin / O Eaken / Ua hAedhagain, O Moynan / O Monan / O Monane / O Monayne / O Monyne / O Moonan / O Moyne / Ua Muanain, Mac Reevy / Mac Crevey / Mac Greevey / Mheic Riabhaigh, Mac Tinney / Mac Atinney / O Tinney / Mac Tinny / Mac Asheeny / Mheic an tSionnaigh. Ancestors - *89.Niallan, *88.Feicc, *87.Felim / Feidlimid, *86.Fiachrach "Cassan, *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 Larkin - Irish / Ua Lorcain - lorc / rough or fierce. A Heremonian Ui Cobhthaigh Dal Cuinn Ui Maine Sept / Family branch, who had their  territory in Co. Galway in Southern Connacht. Ancestors - *86.Maine "Mor" (Ui Maine), 85.Murray / Muiredach "Tireach" the 122nd King of Tara / Ireland, *80.Conn of the Hundred Battles the 110th King of Tara / Ireland.

O Larkin - Irish / Ua Lorcain - lorc / rough or fierce. A Heberian Dal gCais Erenagh Sept / Family branch, who had their territory at Lorrha in Co. Tipperary in Ormond / Aur Mhumhain / North Eastern Munster. Ancestors - *104.Cosgrave / Coscrach, *103.Lorcan / Finghin, *102.Lachtna, *101.Corc, *100.Anluan, *99.Mahon, *98.Turlough (Ui Turlough), *97.Cathal, *96.Aodh "Caomh" the King of Munster, *95.Conall, *94.Eochy / Eochaidh "Baill Dearg," *93.Cairthenn "Fionn  Oge Mor," *92.Blood / Blod (Ui Bloid), *91.Cas (Dal gCais) the King of Thomond.

Larminie. French Huguenot origins. They were in Co. Mayo in the mid - west of the Connacht Province  in the early 18^th Century AD.

Larmour or Larmer or Armour (the armourer) French origins. They were in Ireland in the 17^th 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 non - Catholic Plantations there. Known then as Armorer and Armar. They are now mostly found in the Ulster Province.

Larner. English name. Used for Lardner, which see, in Co. Galway in Southern Connacht.

Mac Larney. See - Mullarney.

Mac Larnon. Mac Lernon and Mac Lorinan were used as variants. 

Mac Larnon - Irish / Mheic Giolla Earnain (Descended from a devotee of St. Earnan) A Sept / Family branch, who had their territory at Iveagh in Co. Down in the south - east of the Ulster Province.

Mac Larnon. Highland Scottish origins -

O Larrissey - Irish / Learghusa - lear / sea - gus / vigour. A Sept / Family branch, who had their territory originally in the Barony of Carra in Co. Mayo in the mid - west of the Connacht Province and are now also in Co. Kilkenny in the south - west of Southern Leinster and the surrounding region.

Mac Lary or Mac Clary. Used as variants for Mac Alary and Mac Cleary, which see.

Lastartan -

Lasty. See - Losty.

Latchford. German Palatine origins. They were in Co. Kerry in the south - west of the Munster Province.

Latham -

Latimer - Latin / Latinarius. Scottish origins. They were in Co. Monaghan and nearby in Co. Cavan in Southern Ulster in 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.

Lattin -

 Latouche. French Huguenot origins. They have been in Co. Dublin in the north - east of Southern Leinster since the end of the 17^th Century AD.

Lattin. English origins. They have been in Co. Kildare in Central Southern Leinster since the 14^th Century AD.

Lauder. See - Lawder.

O Laugheran. See - O Loughran.

Mac Laughlin or Mac Loughlin - Irish / Mheic Lochlainn - loch / lake - lainn / land. A Heremonian Ui Cobhthaigh Dal Cuinn "Northern" Ui Niaill Cenel nEogain Sept / Family branch - who had their fortress at Aileach at Inishowen in Co. Donegal in the north - west of the Ulster Province with their territory in Co. Antrim and the adjacent country in Co. Derry in the north - east of Ulster. (Descended initially from *99.Aed "Findliath" the 38^th King of Tara / Ireland and 25th High King of Ailech. His descendant *104 / *105. Lochlainn is the grandfather of *106.Donnell / Domhnall Ua Lochlainn the 51^st King of the Cenel nEogain and 46a High King of Ireland who was the grandfather of *108.Murtough / Muirchertach Mac Lochlainn the 55/57th King of the Cenel nEogain and 49^th High King of Ireland who died in 1166 AD the original ancestor of this Sept. *99.Aed "Findliath" is the father of 100.Niall "Glun Dubh" / of the Black Knee the 29/30^th King of Cenel nEogain and 40^th King of Ireland who is also the ancestor of all the O Neills of Ulster. Also see Mac Loughlin.  Ancestors - *99.Aed "Findliath," *98.Niall "Caille," *97.Aed "Oirdnide," *96.Niall "Frossach," *95.Fergal the 151st King of Tara  / Ireland, *94.Mael "Duin," *93.Mael "Fithrich," *92. Aed "Uardidnach," *91.Donnell / Domhnall "Ilchegach," *90.Murtough / Muirchertach mac Ercae, *89.Murray / Muiredach the 2nd King of Aileach,  *88.Eogain the 1st King of Aileach (Cenel nEogain), *87. Niall of the Nine Hostages the 126th King of Tara / Ireland (Ui Niaill).

O Laughnane. See - O Loughnane.

Laundy. See - Landy.

St. Laurence - English Barons in Co. Dublin in the north - east of Southern Leinster.