Lowry, Lowrison
Lowry, Lowrison—These two names are the anglicised forms of a Galloway sept, Mac Labharaigh. The Earls of Belmore, Fermanagh, whose ancestors came from Dumfries Co., are of the Lowrys of Galloway. The name is also anglicised Lowrie, and, I believe, Laurie, Lawrie, and Laurison are other forms. A sept of the O'Lowrys of Pictish origin ruled in South Co. Down along with O'Mores, O'Lalors, and O'Loingsighs, septs of the Pictish nation.
Alphabetical Index of Anglicised Surnames in Ireland
See also Woulfe’s Irish Names and Surnames
… and O'Hart's Irish Pedigrees