Genealogy research by Mark Humphrys.
William Douglas, 1st Earl of Douglas (see here),
1st Earl of Douglas also had legitimate issue, ancestor of:
William Douglas, 1st Earl of Queensberry.
He mar 1603 to Isabel Kerr
[dau of Mark Kerr, 1st Earl of Lothian,
of the 1st creation].
He was cr 1633.
1st Earl of Queensberry and his wife are ancestors of:
John Douglas, 9th Marquess of Queensberry,
born 1844.
He succ 1858.
He supervised the formulation of the
"Queensberry rules"
for boxing.
He mar Sibyl Montgomery
[descendant
of
Henry VII,
see descent
by Ed Mann].
9th Marquess and Sibyl
had issue:
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