His mother Margaret was a member of the prominent Corbet family from the nearby Marcher lordship of Caus, and appears to have considerable contact with her son and daughter-in-law until her death around 1250.

In this confession, Owain identified his mother as the designated guardian of the conspirators' plot documents, keeping them under lock and key in her own private chest in the family residence at Pool.

[7] The historian Emma Cavell argues that Hawise's status as a married woman, and her resulting centrality to family and household management, made her an"ideal focus for the protection and/or transmission of privileged information.

Yet, the pattern of her activities to that point, combined with the clear, central involvement of her husband, several of her sons, and several neighbours in tracking Llywelyn's movements and engaging him in the field, make it highly likely that she did play her part.

In 1277 he issued a charter to his wife granting her dower interests then included the township of Buttington, the commotes of Deuddwr and Caereinion and pastures in Cyfeiliog and Arwystli.

After Gruffudd's death in 1286, Hawise ruled her family and much of their territory with something of an iron fist, becoming involved in (among other things) the determined harassment of her daughter-in-law Joan, the widow of her eldest son Owain.

[3] By 1302, however, Hawise was finding estate administration a burden, and between that year and 1306 she was granted permission by the crown to present her debts at the Exchequer of Chester, rather than at Westminster, 'for her easement'.