Margaret FitzBaderon

https://en.wikipedia.org/wiki/Baderon_of_Monmouth

"Baderon confirmed the possessions of the Priory at Monmouth granted by his predecessors, and extended them. His sister Margaret, whose son Robert became prior of Monmouth, and whose second husband, Hugh fitzRichard, was a landowner in Worcestershire, made further grants of land to the priory.[1]"

Source: Kissack, Keith (1974). Mediaeval Monmouth. The Monmouth Historical and Educational Trust. pp. 17–24.