1192 - 1264 (72 years)| Name | Sir William de Ros [1] | |
| Birth | 1192 | Helmsley, Yorkshire, England  [1] |
| Gender | Male | |
| Religion | 16 Dec 1215 | |
| Excommunicated with his father by Pope Innocent III | ||
| Military - Old World | 20 May 1217 | |
| Captured at the Battle of Lincoln | ||
| Death | 1264 | Yorkshire, England [1] |
| Burial | Kirkham, Yorkshire, England [1] |
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| Person ID | I20020 | A Tree Called Smith |
| Last Modified | 21 Jul 2025 | |
| Father | Baron of Helmsley Robert de Ros, b. 1170 d. 23 Dec 1226 (Age 56 years) | |
| Relationship | natural | |
| Mother | Isabella Mac William, b. 1175, Haddington, East Lothian, Scotland d. 23 Dec 1226, London, England (Age 51 years) | |
| Relationship | natural | |
| Family ID | F1601 | Group Sheet | Family Chart |
| Family | Lucy FitzPeter, b. 1205, Breconshire, Wales d. 1266 (Age 61 years) | |||
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| Family ID | F7645 | Group Sheet | Family Chart | ||
| Last Modified | 21 Jul 2025 | |||
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| Arms Icons & Insignia | | Arms-ROOS "Coat of arms of Robert de Roos, Lord of Hamlake Castle" by Rs-nourse - Own work. Licensed under CC BY-SA 3.0 via Wikimedia Commons - https://commons.wikimedia.org/wiki/File:Coat_of_arms_of_Robert_de_Roos,_Lord_of_Hamlake_Castle.png#/media/File:Coat_of_arms_of_Robert_de_Roos,_Lord_of_Hamlake_Castle.png |
| Biographies and Histories |  | Bio-deROS William (1192) Sir William de Ros, Knight of Helmsley and Hunsingore, Yorkshire |
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