Earl William Leslie of Ross & Countess Montrose Euphemia of Ross 
They had a son named Hugh.
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Children
4th Earl Hugh of Ross
Hugh was born in 1275 in Fearn, Ross & Cromarty, Scotland.1 He died as a war casualty, Battle of Halidon Hill, at the age of 58 on July 19th, 1333 in Halidon, Berwick-On-Tweed, Northumberland, England.1