Family: de Mowbray, Sir John II / Plantagenet, Lady Joan of Lancaster (F9292)
m. Between 8 Mar and 12 Jun 1327-
Male
de Mowbray, Sir John II
Birth 7 Dec 1310 Hovingham, Yorkshire, England 
Death 12 Oct 1361 Bedford, Bedfordshire, England Burial 28 Oct 1361 Greyfriars, Bedford, Bedfordshire, England Marriage Between 8 Mar and 12 Jun 1327 [1, 2, 3, 4, 5, 6, 7, 8] Father de Mowbray, Sir John I | F9389 Group Sheet Mother de Braose, Alienora | F9389 Group Sheet
Female
Plantagenet, Lady Joan of Lancaster
Birth 1312 Grismond or Grosmont Castle (destroyed), Grosmont, Monmouthshire, Wales Death 15 Jul 1349 Byland Abbey, Yorkshire, England Burial Aft 15 Jul 1349 Byland Abbey, Yorkshire, England Father Plantagenet, Henry | F9372 Group Sheet Mother de Chaworth, Maud | F9372 Group Sheet
Male
de Mowbray, John III
Birth 3 Jul 1340 Epworth, Lincolnshire, England Christening 10 Jul 1340 Epworth, Lincolnshire, England Death 25 Oct 1368 Thrace, Istanbul, Istanbul, Turkey Burial Aft 25 Oct 1368 Thrace, Istanbul, Istanbul, Turkey Spouse de Segrave, Baroness Elizabeth | F9290 Marriage 25 Mar 1349 Lincoln, Lincolnshire, England
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Sources - [S327] WORLD: Find-a-Grave.
https://www.findagrave.com/ - [S789] WORLD: Family Search, Family Tree.
https://www.familysearch.org/search/tree/name - [S844] WORLD: Foundation for Medieval Genealogy.
http://fmg.ac/ - [S774] WORLD: WikiTree.
https://www.wikitree.com/ - [S862] ENGLAND: Plantagenet Ancestry of Seventeenth-Century Colonists, David Faris.
https://www.familysearch.org/search/catalog/988479?availability=Family%20History%20Library - [S788] WORLD: Wikipedia.
https://www.wikipedia.org/ - [S1890] USA: FAMILIES: The Garr Genealogy, John C. Garr.
https://ia600902.us.archive.org/21/items/genealogyofdesce00garr/genealogyofdesce00garr.pdf - [S820] ENGLAND: Magna Carta Sureties 1215 by Frederick Lewis Weis.
https://www.familysearch.org/search/catalog/825421?availability=Family%20History%20Library
- [S327] WORLD: Find-a-Grave.