MONTGOMERIE, John 'Lord of Ardrossan', Sir ^{1 2}

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John married Agnes 'of the Isles'. (Agnes 'of the Isles' was born about 1375 and died before March 1413(1414) ¹.)

  Marriage Notes:

"Sir John was twice married, first, to a lady named Agnes of the Isles, who died before March 1413-14 ; secondly (dispensation dated 4 May 1414), to Margaret, daughter of Sir Herbert Maxwell of Carlaverock."

from Scots Peerage (vol 3) ¹

John next married Margaret MAXWELL, daughter of Sir Herbert MAXWELL of Caerlaverock and Katherine STEWART, 4 May 1414(dispensation).^{1 2} (Margaret MAXWELL was born about 1388.)

  Marriage Notes:

"Margaret. A papal dispensation was granted, May 1414, for her marriage with Sir John Montgomery of Ardrossan, the two being within the fourth degree of kindred and affinity. Sir William Fraser, citing no authority, calls her daughter of Sir Herbert."

from Scots Peerage (vol 6)

Note:
The date of the above-mentioned papal dispensation and the proposed parentage of Joanna Montgomery, the wife of Thomas Boyd of Kilmarnock, raises a logistical difficulty. They are inconsistent, unless the marriage took place well before the dispensation was granted. ²