"[1][2][3] The source of the name "hUallacháin" (Houlihan) is from the progenitor of the family Prince Uallachan Mac Flann:[1] "A rough-fettering lord of distinguished valour, venomous- weaponed, h-Uallachan.
The name found in this article is the main line whom were "Chiefs of Siol Anmchadha in Hy-Maine" (Uí Mháine) as listed in John O'Hart's Pedigree of the Irish Nation.
[6] At times, The Ó hUallacháin was the King and or Chief of Siol Anmchadha, as addressed in the "Annals of Ireland," and, "Tribes and Customs of Hy-Many."
[4][12] King Giolla Finn Mac Uallacháin, Chief of the Name Ó hUallacháin, Chief of the Munter Cinaith,[15] Chief of Siol Anmchadha, King of Siol Anmchadha (reigned 1096-1101)[16][3][15][8][17] Archbishop of Cashel, Archbishop of Munster, Donal Ua hUallacháin (in office 1171-1182)[18][8] Henry Cuolahan, of Cogran Esq., Last head of the Mac Cuolahan line.
"[20][21] James Woulahan, an Independent politician who ran in the 1985, and 1989, Braid Valley District elections for the Ballymena Borough Council.