Member Information
| Full Name | ♀️ Agatha de Ferrers -  |
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| Father | Sir William III Ferrers, 5th Earl of Derby | ||
| Mother | Margaret De Quincy | ||
| Siblings | ♀️ Joane de Ferrers, ♀️ Elizabeth Marshall De Ferrers, ♂️ Robert 6th Earl of Derby De Ferrers, ♀️ Joan Ferrers, ♂️ Sir William Constable of Scotland de Ferrers (Ferrers) | ||
| Death | #1 | Date of death | MAY 1306 |