Alexander III (Medieval Gaelic: Alaxandair mac Alaxandair; Modern Gaelic: Alasdair mac Alasdair) (4 September 1241 – 19 March 1286) was King of Scots from 1249 until his death.
He concluded the Treaty of Perth, by which Scotland acquired sovereignty over the Western Isles and the Isle of Man.
His heir, Margaret, Maid of Norway, died before she could be crowned.
Author: Unknown Source: Late medieval manuscript of the Scottichronicon by Walter Bower. From folio 206 in Corpus Christi College Cambridge MS 171; it is included in D.E.R. Watt, Simon Taylor and Brian Scott (eds.), Scotichronicon by Walter Bower in English and Latin, volume 5, (Aberdeen, 1990), illus 1, facing p. 288. License: CC-PD-Mark PD-Art (PD-old-100)