History of the Stewarts | Family Lines
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Patrick Stewart 2nd Earl of Orkney
1. Robert Stewart, was an illegitimate son by Marjorie Sinclair. On his father’s arrest he seized Kirkwall castle which was laid siege to by government forces. He surrendered to the Earl of Caithness and was hanged in Edinburgh, on 6 January 1615.
2. Mary Stewart, an illegitimate daughter. 3. Katherine Stewart, m. John Sinclair of Ulbster, and had issue.
3. Katherine Stewart, m. John Sinclair of Ulbster, and had issue.