CUMMYN, John of Coulter ¹

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John married Janet IRVINE, daughter of Alexander IRVINE 5th of Drum, Sheriff of Aberdeen and Daughter LINDSAY.¹ (Janet IRVINE was born about 1463.)

  Marriage Notes:

"Of Alexander's son David there are no records beyond the fact of his marriage with Jonet Irvine of Drum, and that they had one son, Alexander (Mathers VII), who succeeded his grandfather (Mathers VI). Jonet was a daughter of Alexander, sixth Laird of Drum, by his second wife. After David's death she married, in 1480, John Cummyn of Culter."

from History of the Barclay Family

Note:
There is a difficulty with dates here, given that Janet's first husband died before his father, who himself died in 1497.

Janet might just fit as the daughter of the first wife of the 6th Laird of Drum, but not of the second wife. The dates are, however, consistent enough for her to be a daughter of the second wife of the 5th Laird of Drum. ¹