Nielsen Hayden genealogy
Robert de Thweng

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Name Robert de Thweng Born of Kilton in Brotton, Yorkshire, England [1]
Gender Male Died Bef 1285 [1] Person ID I17263 Ancestry of PNH, TNH, and others | Ancestor of AP, Ancestor of EK, Ancestor of JTS, Ancestor of WPF Last Modified 29 Oct 2017
Father Marmaduke de Thweng, b. of Kilton in Brotton, Yorkshire, England , d. Between 1282 and 1284
Mother Lucy de Brus, d. Aft 29 Mar 1282 Married Abt 1242 [1, 2, 3] Family ID F3716 Group Sheet | Family Chart
Family Alice de Merlay, b. Abt 1258, d. Bef 7 Feb 1268 (Age ~ 10 years) Children + 1. Lucy de Thweng, d. 8 Jun 1346 Last Modified 29 Oct 2017 Family ID F10759 Group Sheet | Family Chart
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Sources - [S142] Royal Ancestry: A Study in Colonial and Medieval Families by Douglas Richardson. Salt Lake City, 2013.
- [S76] The Oxford Dictionary of National Biography. Oxford University Press, 2004-ongoing.
- [S128] The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant ed. Vicary Gibbs, H. A. Doubleday, Duncan Warrand, Howard de Walden, Geoffrey H. White and R. S. Lea. 2nd edition. 14 volumes (1-13, but volume 12 spanned two books), London, The St. Catherine Press, 1910-1959. Volume 14, "Addenda & Corrigenda," ed. Peter W. Hammond, Gloucestershire, Sutton Publishing, 1998.
- [S142] Royal Ancestry: A Study in Colonial and Medieval Families by Douglas Richardson. Salt Lake City, 2013.