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John of Islay, Lord of the Isles

Scottish Lord of the Isles (1336–1386) and chief of Clan Donald

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Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionSep 10, 2026
Entity authorityQ3024016 ↗
Source-derived summary

John of Islay (or John MacDonald) (Scottish Gaelic: Eòin Mac Dòmhnuill or Scottish Gaelic: Iain mac Aonghais Mac Dhòmhnuill) (died 1386) was the lord of the Isles (1336–1386) and chief of Clan Donald. In 1336, he styled himself Dominus Insularum ('Lord of the Isles'), although this was not the first ever recorded instance of the title in use. Some modern historians nevertheless 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 ('King of the Isles'), in use since the Viking Age. For instance, the even more similar Latin title dominus de Inchegal ('Lord of the Hebrides'), 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. Clan Donald considers the title "Lord of the Isles" to have been in use at least since Angus Mor Macdonald, who died in 1293, and the title "King of the Isles" in use since Somerled, the Norse-Gael who forged the Kingdom of the Isles in the 12th century.

Biography

John was the son of Aonghus Óg Mac Domhnaill, an Islay-based nobleman who had benefited from King Robert I of Scotland's attacks on the MacDougall (Mac Dhùghaill) rulers of Argyll and their Comyn allies, and had been given Ardnamurchan, Lochaber, Duror and Glencoe, turning the MacDonalds from the Hebridean "poor relations" into the most powerful kindred of the north-western seaboard. The loyalty of Aonghas to Robert, however, did not mean that John's loyalty to Robert's son and successor David II would follow suit. After Edward Balliol's coup against the Bruce regime in 1333, Edward attempted to court John. In 1336, Edward confirmed the territories which the Islay lords had acquired in the days of Robert I; and additionally, Edward awarded John the lands of Kintyre, Knapdale, Gigha, Colonsay, Mull, Skye, Lewis, and Morvern, held by magnates still loyal to the Bruces.

Editorial summary

Begin with the source’s own compact description: “John of Islay, Lord of the Isles” is scottish Lord of the Isles (1336–1386) and chief of Clan Donald. The dossier treats that line as a proposition to test through John, Islay and Lord, not as a finished interpretation.

Editorial reviewA practical starting point whose main value is the path it opens into stronger specialist and primary sources. The current lead gives the account dated anchors—1386, 1336, 1293, 1333—that can be checked directly. The linked authority record independently contributes the date 1318. For this dossier, John, Islay and Lord is the immediate research focus.
Editorial analysis

Why this record matters

The phrase “scottish Lord of the Isles (1336–1386) and chief of Clan Donald” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.

Evidence profile

Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Sep 10, 2026. The linked authority identifier is Q3024016. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1386, 1336, 1293 and 1333.

Critical limits

Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

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Source & attribution

This entry incorporates text from “John of Islay, Lord of the Isles” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.