Please see these three profiles:
* [John Stewart of Bigtoun John Stewart]
* [Grizel Sinclair Grizel Sinclair]
* This profile, Grisell / Grizel Stewart
The profile of John is administered by more than two persons, which makes it not so impossible that two differently written Version of Grizel "survived" the merge of the more than two John profiles. Please support this discussion with truly good sources and knowledge, like books and state registers. Question: Shall we merge, or not merge, the two Grizel ?
https://archive.org/stream/scotspeeragefoun06paul#page/574/mode/2up
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. "The Earls of Orkney" page 575
Sir Robert Stewart, 1st Earl of Orkney, Lord of Shetland was born circa 1533. ... He also had a number of illegitimate children ....
9. Grizel, wife of Hugh Sinclair of Brough
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Two different Grizel's.