Family: John Fitz Marmaduke / Isabella Bruce (F1329)
m. 1271Robert "The Competitor" Brus, Lord (1210-1295) 
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Isabel De Clare (1226-1264)
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Robert De Brus, Earl of Carrick (1243-1304)  |
| Bernard Brus, [Sir Knight] (1247- ) |
| William Brus (1248- ) |
| Richard De Brus (1249-1286) |
| John Brus (1252- ) |
| Alosia Bruce (1254- ) |
| Christiana Bruce (1256- ) |
| Isabella Bruce (1252-1300)
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