Member Information
| Full Name | ♀️ Margaret Roos -  |
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| Birth | #1 | Date of Birth | 1366 |
| Place of Birth | Helmsley Castle, North Riding Yorkshire, England | ||
| Father | Thomas de Roos | ||
| Spouse | #1 | Name | Sir Reynold 3rd Lord Grey of Ruthin Grey |
| Children | ♂️ Thomas de Grey, ♂️ Edmund de Grey, ♀️ Catherine Grey, ♂️ Sir John of Ruthin de Grey, KG, ♀️ Eleanor Grey, ♀️ Margaret Grey | ||
| Death | #1 | Date of death | 1414 |
| Place of death | Ruthin, Denbighshire, Wales | ||