1) (formerly O'Coinn, Chiefs of Muintir-Ifearnain, a territory extending around Corofin, in the barony of Inchiquin, co. Clare. The Chief of the Sept had his seat at Inchiquin, but was driven out by the O'Briens; the tribe name of Ifearnain is derived Ifearnain, son of Corc, one of the Dalcassian Septs. The Four Masters record that Edavin, dau. of O'Quin, Lady of Munster, d. 1188 while on a pilgrimage at Derry. Of this ancient Irish Sept the Earl of Dunraven is a descendant). Gu. a hand couped below the wrist grasping a sword all ppr. betw. in chief two crescents ar. and in base as many serpents erect and respecting each other, tails nowed or. Crest: A boar's head erased and erect ar. langued gu.
2) (Wyndham-Quin, Earl of Dunraven and Mount Earl). Quarterly, 1st and 4th, same as the last, for O'Quin, of Muintir-Ifearnain; 2nd and 3rd, az. a chev. betw. three lions’ heads erased or, langued gu. a mullet ar. for diff., for Wyndham. Crests—1st, O'Quin: A wolf's head erased ar.; 2nd, Wyndham: A lion's head erased or, within a fetterlock and chain gold. Supporters—Two ravens’ wings elevated ppr. collared and chained or. Motto—Quae sursum volo videre.
3) (formerly O’Cuinn, Chiefs of Muintir-Gillagan, a territory extending over the present baronies of Ardagh, Moydon, and Shrule, co. Longford, which they were dispossessed of by the O’Ferralls temp. Edward II. and Edward III., the Chief of the Sept had his residence at Rathcline, in Anally. The Four Masters record, under the year 1171, that Tiernan O’Rourk, at the head of the men of Breffney, made an attack on Miles de Cogan and his knights, but was defeated with great loss; among the slain was the grandson of Dermod O'Cuinn). Vert a pegasus pass, wings elevated ar. a chief or.
4) (Galway, Longford, and Bordeaux; allowed by Hawkins, Ulster, 1775, to Patrick O'Quin, of Galway, son of John Valentine O'Quin, of Bordeaux, who was descended from Thomas O’Quin, of co. Longford, a.d. 1387). Same Arms. Crest—A wolf's head erased erm. Motto—Quo sursum volo videre.
5) (granted by Carney, Ulster, 1688, to Thady Quin, Esq., of Adare, J.P. co. Limerick, descended from an ancient and honourable family of that surname). Vert a pegasus erm. a chief or. Crest—A wolf's head erased erm. Motto—Quæ sursum volo videre.
6) (Wyndham-Quinn, Earl of Dunraven and Mountearl). Quarterly, 1st and 4th, gu. a hand couped below the wrist grasping a sword ppr. on each side a serpent, tail nowed, the heads respecting each other or, in chief two crescents ar., for O’Quin, of Munster; 2nd and 3rd, az. a chev. betw. three lions' heads erased or, with a mullet for diff., for Wyndham. The Earl of Dunraven wishing to perpetuate the more ancient arms of his ancestors, the O’Quins, of Munster, obtained from the present Ulster King of Arms the right to bear thcin, instead of those assigned to his ancestor, Thady Quin, Esq., of Adare, by Carney, Ulster, 29 Nov. 1688. Crests—1st, Quin: A wolf's head erased ar.; 2nd, Wyndham: A lion’s head erased within a fetterlock and chain or. Supporters—Two ravens with wings elevated ppr. collared and chained or. Motto—Quæ sursum volo videre.
7) (Quinsborough, co. Clare; exemplified to Lord George Taylor, second son of Thomas, first Marquess of Headfort, by Mary Quin, his wife, only dau. and heir of George Quin, Esq., of Quinsborough, upon his assuming, by royal licence, 1813, the surname of Quin). Vert a pegasus courant, wings endorsed erm. a chief or, a crescent for diff. Crest—A wolf's head erased erm. Motto—Quæ sursum volo videre.
8) (confirmed by Carney, Ulster, 1690, to Thomas Quin, Captain in the Dublin Militia, and High Sheriff of the city). Per pale or and az. a pegasus erm. rising from a mount ppr. Crest—A wolf's head erased gu. charged with a cinquefoil or.
9) (co. Galway; Reg. Ulster’s Office). Vert a pegasus erm. Crest—A demi pegasus erm.
10) (Dublin; Fun. Ent. Ulster’s Offiee, 1620, Elinor, dau. of John Quin, and wife of Robert Barnewall). Vert a pegasus pass. erm. wings elevated gu.