Nielsen Hayden genealogy
Family: Ralph de Cromwell / Margaret de Somery (F3030)
m. Bef 26 Jan 1271-
Father | Male
Ralph de Cromwell
Born of Cromwell, Derbyshire, England 
Died Bef 18 Sep 1289 Buried Married Bef 26 Jan 1271 [1, 2, 3, 4] Other Spouse Mazera Marmion | F1595 Married Father Ralph de Cromwell | F6470 Group Sheet Mother
Mother | Female
Margaret de Somery
Born Died Aft 18 Jun 1293 Buried Other Spouse Ralph Basset | F2915 Married Father Roger de Somery | F5939 Group Sheet Mother Nichole d'Aubigny | F5939 Group Sheet
Child 1 | Male
+ Ralph de Cromwell
Born of Cromwell, Southwell, Nottinghamshire, England 
Died Bef 2 Mar 1299 Buried Spouse Joan de Somerville | F10318 Married Bef 1292 and 1293
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Sources - [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.
- [S145] Ancestral Roots of Certain American Colonists Who Came to America Before 1700 by Frederick Lewis Weis and Walter Lee Sheppard, Jr. 8th edition, William R. Beall & Kaleen E. Beall, eds. Baltimore: Genealogical Publishing Company, 2004, 2006, 2008.
- [S1526] The Ancestry of Dorothea Poyntz, Wife of Reverend John Owsley, Generations 1-15, Fourth Preliminary Edition, by Ronny O. Bodine and Bro. Thomas Spalding, Jr. 2013.
- [S3215] Medieval Welsh Ancestors of Certain Americans by Carl Boyer III. Santa Clarita, California, 2004.
- [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.