Family: John de Brewes / Margaret Princess of North wales (F1982)
Llewelyn of North Llewelyn, Prince of Wales (1173-1240) 
|
Princess Joan of England (1188-1237)
|
Gladys Dhu Verch Llewelyn (1194-1251)  |
| Wentelina Gwladus Princess North wales, "du" (1205-1251) |
| Helen Princess of North wales (1206-1253) |
| Helen Verch Llewelyn (1206-1253) |
| Margred Verch Llewelyn (1206- ) |
| Dafydd Prince of North wales (1209-1246) |
| John de Brewes (1208- ) |
| Margaret Princess of North wales (1210- )
|