List of Famous people with last name Islay

John of Islay was the Lord of the Isles (1336–1386) and chief of Clan Donald. In 1336, he styled himself Dominus Insularum, "Lord of the Isles"; because this is the first ever recorded instance of the title in use, modern historians count John as the first of the later medieval Lords of the Isles, although this rather broad Latin style corresponds roughly with the older Gaelic title Rí Innse Gall, in use since the Viking Age, and for instance, the even more similar Latin title dominus de Inchegal, applied to Raghnall Mac Somhairle in the mid-12th century. In fact John is actually styled Rí Innsi Gall or King of the Isles shortly after his death in a contemporary entry in the Irish Annals of Ulster.

Donald, Lord of the Isles, was the son and successor of John of Islay, Lord of the Isles and chief of Clan Donald. The Lordship of the Isles was based in and around the Scottish west-coast island of Islay, but under Donald's father had come to include many of the other islands off the west coast of Scotland, as well as Morvern, Garmoran, Lochaber, Kintyre and Knapdale on the mainland.

Aonghus Óg Mac Domhnaill, or Angus Og MacDonald, was a fourteenth-century Scottish magnate and chief of Clann Domhnaill. He was a younger son of Aonghus Mór mac Domhnaill, Lord of Islay. After the latter's apparent death, the chiefship of the kindred was assumed by Aonghus Óg's elder brother, Alasdair Óg Mac Domhnaill.

Alasdair Óg Mac Domhnaill was Lord of Islay and chief of Clann Domhnaill. He was the eldest son of Aonghus Mór mac Domhnaill, Lord of Islay. Alasdair Óg seems to first appear on record in 1264, when he was held as a hostage of the Scottish Crown for his father's good behaviour. During Alasdair Óg's career, the Scottish realm endured a succession crisis as a result of the unexpected death of Margaret, Maid of Norway, heir to the Scottish throne, in 1290. One of several factions that staked a claim to the throne was the Bruce kindred. Both Alasdair Óg and his father were cosignatories of the Turnberry Band, a pact that may have partly concerned the Bruces' royal aspirations.

Domhnall Mac Domhnaill, also known as Domhnall of Islay and Domhnall of the Isles, was a fourteenth-century Scottish nobleman. He appears to have been a member of Clann Domhnaill. First attested in the first decade of the fourteenth century, Domhnall appears to be last recorded in the second decade upon his death. Domhnall's attestations suggest that he was a claimant to the chiefship of Clann Domhnaill, and may have possessed the chiefship.