William Douglas, 1st Earl of Douglas 
 William Douglas, 1st Earl of Douglas.
See 
wikipedia.
 
He built 
Tantallon Castle c.1350.
 
He had an affair with 
  Margaret Stewart, Countess of Angus  
[descendant of 
 David I, King of Scotland
and of 
Edmund II (Ironside)
 and of 
 Charlemagne].
 
 He  had illegitimate issue by her:
-    George Douglas, 1st Earl of Angus.
   
 
Tantallon Castle.
Photo 2008.
See  
full size.
From 
here.
See 
terms of use.
 The Marquess of Queensberry 
 William Douglas,
1st Earl of Douglas,  is  ancestor of  
Earls and Marquesses  and Dukes of Queensberry,
including 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:
 
-  Lord Alfred Douglas,
 born 1870. 
 Gay lover of 
 Oscar Wilde.
 In 1895, his   father called Wilde a sodomite.
 
Wilde   stupidly sued him for libel.
 The case ruined Wilde.
He ended up   charged with homosexual acts (then illegal).
Wilde defended "The love that dares not speak its name",
but he couldn't change the law and got two years in jail.