| 1. | Robert de Roos was born about 1170; died in 1227. Robert married Isabel MacWilliam in 1191 in Haddington, East Lothian, Scotland. [Group Sheet] [Family Chart]
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| 2. | Sir William de Roos, of Helmesley William married Lucy FitzPeter before 24 Jan 1234. Lucy (daughter of Peter FitzHerbert, of Blaen Llynfi and Alice FitzRoger) died in 1266. [Group Sheet] [Family Chart]
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| 3. | Alice de Roos Alice married Sir John "The Red No. 1" Comyn, of Badenoch about 1260. John (son of Richard Comyn, of Badenoch) died about Jul 1278. [Group Sheet] [Family Chart]
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| 4. | Sir John "le jeon" Comyn, of Ulceby Family/Spouse: Unknown. [Group Sheet] [Family Chart]
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