Alexander III ( Medieval Gaelic : `` Alaxandair mac Alaxandair '' ; Modern Gaelic : `` Alasdair mac Alasdair '' ) ( 4 September 1241 -- 19 March 1286 ) was King of Scots from 1249 to his death .
Alexander III ( Mediaeval Gaelic : `` Alaxandair mac Alaxandair '' ; Modern Gaelic : `` Alasdair mac Alasdair '' ) , King of Scots , was born at Roxburgh on 4 September 1241 and died on 19 March , 1286 .