John de Keith of Inverugie

https://fmg.ac/Projects/MedLands/SCOTTISH%20NOBILITY%20UNTITLED.htm...

2nd son of Edward de Keith by his 1st wife, Isabel of Sinton. Married Mariota de Cheyne in 1368/9.

"Sir Edward Keith had two sons - Sir William, and John (designed in 1354 the son of Sir Edward and brother of Sir William great Marischal of Scotland). John, marrying Mariota, daughter of Sir Reginald Cheyne of Inverugie, began the line of the Inverugie Keiths."

• page 36-37 of The Scots peerage : founded on Wood's ed. of Sir Robert Douglas's Peerage of Scotland; containing an historical and genealogical account of the nobility of that kingdom by Paul, James Balfour, Sir, 1846-1931 Published 1904 Volume 6.