Beecroft/Becraft Ancestors

Sir Marmaduke de Thweng of Kilton Castle and Lucy de Brus

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Husband Sir Marmaduke de Thweng of Kilton Castle [18222] ¹

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           Born: 1225 - Flamborough, Yorkshire, England, United Kingdom 1
     Christened: 1225 - Kilton, Thring, England 1
           Died: Dec 1279 - Castleton, Derbyshire, England 1
         Buried: Dec 1284 - Guisborough, Yorkshire, England 1
FamilySearch ID: LY9N-KYP

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         Father: Robert de Thweng [18224] (1205-1268) 2
         Mother: Matilda of Kilton [18225] (Abt 1205-1279) 2

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       Marriage: 1242 - Yorkshire, England, United Kingdom 3

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Wife Lucy de Brus [18223] ¹

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           Born: 1239 - Durham, England, United Kingdom 1
     Christened: 
           Died: 29 Mar 1282 - Guisborough, Yorkshire, England 1
         Buried: Apr 1282 1
FamilySearch ID: LBP8-XCZ

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         Father: Sir Peter de Brus II [18228] (Abt 1202-1241) 3
         Mother: Hawise de Lancaster [18229] (Abt 1204-Abt 1245) 3

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Events

• TitleOfNobility: great, great granddaughter of Adam de Brus, Lord of Skelton brother to Robert de Brus, 1s, .

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Children

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1 M Marmaduke de Thweng [18220] ⁴

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           Born: 1253 - Saltburn-by-the-Sea, Yorkshire, England 4
     Christened: 
           Died: 23 Apr 1323 - Yorkshire, England, United Kingdom 4
         Buried:  - Guisborough, Yorkshire, England 4
FamilySearch ID: MYJX-G82

         Spouse: Isabel de Ros 4 [18221] (Abt 1277-1309)

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Sources

1 The Church of Jesus Christ of Latter-day Saints, "FamilySearch Family Tree," database, FamilySearch (https://www.familysearch.org : accessed 13 Nov 2025), entry for Marmaduke de Thweng, person ID MYJX-G82.

2 The Church of Jesus Christ of Latter-day Saints, "FamilySearch Family Tree," database, FamilySearch (https://www.familysearch.org : accessed 13 Nov 2025), entry for Marmaduke de Thweng, person ID LY9N-KYP.

3 The Church of Jesus Christ of Latter-day Saints, "FamilySearch Family Tree," database, FamilySearch (https://www.familysearch.org : accessed 13 Nov 2025), entry for Lucy de Brus, person ID LBP8-XCZ.

4 The Church of Jesus Christ of Latter-day Saints, "FamilySearch Family Tree," database, FamilySearch (https://www.familysearch.org : accessed 13 Nov 2025), entry for Margaret de Thweng, person ID G68J-CYV.