Sir Marmaduke de Thweng, Knt., 1st Lord Thweng

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ChartsAncestors of Harriet Hanson Robinson
Ancestors of Wilford Ervie Billings
Sir Marmaduke de Thweng, Knt., 1st Lord Thweng, son of Sir Marmaduke de Thweng, Knt. and Lucy de Brus, died before 26 February 1322/23.1

Marmaduke married Isabel de Roos, daughter of Sir William de Roos, Knt. and Eustache Fitz Ralph, 1273.2


Isabel de Roos d. 1309


  1. [S1947] Douglas Richardson, Royal Ancestry: A Study in Colonial and Medieval Families, Five vols. (Salt Lake City, Utah: s.p., 2013), 5:156 (Thweng 7.ii), further cited as Richardson, Royal Ancestry.
  2. [S1947] Richardson, Royal Ancestry, 5:155 (Thweng 7.ii).
This person was last edited on26 Jul 2019