I find reference to three MacGorrie families, "MacGorrie MacDonald", "MacGorrie Lamont" and another earlier family predating both the MacDonald and Lamont origins. From"The surnames of Scotland: their origin, meaning, and history" by George Fraser Black: "The family of Macgorrie is descended from Goraidh or Godfrey, youngest son of "the good John of Isla," Lord of the Isles, who died in 1380. Duncan M'Goffry, a knight of John de Ergadia (Argyll) in 1315 appears in the following year as Donekan de Makoury and in 1319 he appears again as Sir Dungan Mac Gofferri ( Bain, m, 479, 521 ). (2) The Macgorrie Laments of Knockdow are descended from Goire an tigheam ruadh, Godfrey the red baron, lord of Inverchaolain, who flourished c. 1430 ( McKechnie, The Lamont Clan, p. 418)." Duncan M'Goffry (a knight of John de Ergadia, i.e. a Ewne MacDougald), I think cannot be a son of Godfrey mac John of Isla (Eoin na-h Ile).