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| Cauley | rare: Derry etc. See Mac Auley. |
| Cawley | fairly numerous: N Connacht etc. Ir. Mac Amhlaoibh. Variant of MacAwley, q.v. IF. |
| Mac Amhalghaidh | Mac Auley, Mac Cauley: líonmhar, Cúige Uladh go sonrach, ach tá na leagain ghallda meascaithe le Mag Amhlaoibh, q.v. (1) Clann a bhí suite san Iarmhí. (2) Dream Albanach as Dumbarton: iad seo is cúis an sloinne bheith líonmhar in Oir. Uladh. Sa litriú nua: Mac Amhalaí. Sean-ainm pearsanta Gaelach is ea Amalgaid. IF, GPN. |
| Mac Amhlaoibh | Mac Auliffe, Mac Auley: líonmhar tríd an dtír. Dhá chlann éagsúla (1) craobh des na Carthaigh i nDeasmhumhain, (2) dream de chuid Mhig Uidhir Fhear Manach. Ón ainm pearsanta Lochlannach Olaf, gur ghlac na Gaeil leis. IF & GPN. |
| Macauley | Very numerous: Ulster generally, Dublin etc. (1) Mac Amhlaoibh, from Norse Olaf, related to the Maguires of Fermanagh. (2) Mac Amhalghaidh, from early first name, associated with the Midlands. Compare Mac Auliffe. |
| MacCauley | numerous: Derry, Ulster generally; Leitrim, Galway, Wexford etc. A variant of Macauley, q.v. The Irish is Mac Amhlaoibh in Ulster, Mac Amhalghaidh in the south. |
| MacCawley | Very rare: Midlands. See Mac Cauley. |
Parishes where a McAulay and a second surname married each other.