Earl of Buchan, The "Wolf of Badenoch"

Alexander Stewart, Earl of Buchan, Alasdair Mór mac an Rígh, and called the Wolf of Badenoch (1343 ? 20 June 1405), was the third surviving son of King Robert II of Scotland and youngest by his first wife, Elizabeth Mure of Rowallan. He was the first Earl of Buchan since John Comyn, from 1382 until his death. Alexander married the widowed Euphemia I, Countess of Ross, but they had no children although he did have a large family by his longtime mistress, Mairead inghean Eachann. Alexander was Justiciar of Scotia for a time, but not an effective one. He held large territories in the north of Scotland before eventually losing a large part of them. Alexander is remembered for his destruction of the royal burgh of Elgin and its cathedral. His nickname was earned due to his notorious cruelty and rapacity but there is no proof that it was used during his lifetime (wikipedia.com)