O Linneen - Irish / Ua Luinin. An Erenagh Sept / Family branch, who had their territory in Co. Fermanagh in the south - west of the Ulster Province. Ua Leannain was also used as a synonym and many also changed to Leonard. See also Lennon.

O Linnegar. Used as a variant for O Linneen, which see, in Co. Fermanagh in the south - west of the Ulster Province.

Linnet. See Lynott.

Linsky. See Lynskey.

Lint. See Skelton.

Linton. English toponymic origins used to abbreviate Mac Clinton, which see. See also Glendon.

Lions -

Lipsett / Lipsitz. German origins in Co. Donegal in the north - west of the Ulster Province since the early 18th Century AD.

O Lira -

Mac Lise. Heremonian Dal Cuinn Colla Da Crioch Siol Daim Argait Ui Cremthainn Clann Lugainn Sept / Family branch. who had their territory in Co. Derry in the north - east of the Ulster Province. Especially see Mac Aleese. (There are many variants with the actual Mac Lise being from the Scottish Highlands who were previously known as Mac Leish who where in Co. Cork in Desmond / Southern Munster).

Lisle. See Lyle.

Lister. Used to abbreviate Mac Alister, which see.

Lister. Scottish origins used for Fletcher, which see - Gaelic / Mheic an Leastair in the Ulster Province.

Lister. Used as a synonym for St. Leger, which see, in Co. Kildare in Central Southern Leinster.

Lister / Lester (dyer) de Leycester. English origins -

Liston / de Lexinton. Anglo Norman origins in Co. Limerick in the mid - north - west of the Munster Province since the 13th Century AD.

Little. English name used as a synonym for Begg, Beggane, Biggane and Petty / Pettit, which see.

Littleton. Synonymous with Little and Beggane, which see, in Co. Down in the south - east of the Ulster Province.

Litton. English toponymic origins in Co. Meath in the south - east of Northern Leinster in 1420 AD and later nearby in Co. Dublin in the north - east of Southern Leinster since 1692 AD.

Mac Liveen - Irish / Mheic Giolla Mhin. A Sept / Family branch, who had their territory in the south of Co. Down in the south - east of the Ulster Province.

O Liver. Original spelling. Especially see O Livroy.

O Livroy or O Liver or O Lefroy - Irish / Ua Libhoir. Heremonian Dal Cuinn "southern" Ui Niaill Ui Laeghaire Sept / Family branch who had their territory in Meath in Northern Leinster. Ancestors:  *90.Niall = of the Nine Hostages the 126th King of Tara / Ireland. *91.Leary / Laighaire the 128th King of Tara / Ireland, 92.Eanna, 93.Dallan, 91.Libhor direct male line ancestor of the Ui Libhoir Sept. Especially see O Connellan.

Livett. See Lyvet.

Livingstone. They were in the Ulster Province. See also Levens.

Lloyd or Loyd. See Floyd.

O Loan or O Loane - Irish / Ua Luain / luan (hound or warrior). A Sept / Family branch, who had their territory in Co. Tyrone in Central Ulster.

O Loan or O Loane or  O Loon or O Luan or O Lamb or O Lambe - Irish /  Ui Luain / luan (hound or warrior). 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 / Airghialla / Oriel. Some changed to Lamb and Lambe by mistranslation of uan / lamb.  Ancestors: *86.Cairbre Liffeachair the 117th King of Tara / Ireland. 87.Eochy / Echu Doimhlen, 88.Murray / Muireadach Colla Da Crioch - of the Two Countries, 89.Rochadh / Rochatha, 90.Dega Duirn, 91.Feicc, 92.Criffan / Crimthainn Leith / Lethan, 93.Eochy / Echach, 94.Cairpre Daim Argait,  95.Nadsluaig, 96.Fergus, 97.Cronan, 98.Maoilfothartaigh, 99.Mailduib, 100.Aitheachda, 101.Artrach, 102.Maoilfothartaigh, 103.Ruadrach, 104.Fogartach, 105.Duncan / Donncuan, 106.Fogartach, 107.Laidgnen, 108.Murray / Muireadach, 109.Fogartach, 110.Lethlobar,  

Loch. See Lough.

O Lochrane. See O Loughrane.

Locke. English origins in Ireland since the 16th Century AD.

Lockhart -

Lodge -

Loe -

Loftus. Heremonian Dal Cuinn Cola Da Crioch Sept / Family branch.

O Loftus. Used as a synonym for O Loughnane, especially see, in Co. Mayo in the mid - west of the Connacht Province.

Loftus. English origins in Ireland in the 16th Century AD.