This paper explores the themes of abduction, patronage, female wealth and marital relationships through their intersection in the life of Derbforgaill (d. 1193), whose abduction in 1152 sparked a chain of events that contributed to the English invasion of Ireland. Derbforgaill is also remembered for her donations to Mellifont in 1157, during the consecration of its ‘church of the monks’, and to the construction of a nuns’ church in Clonmacnoise in 1167. Focusing on the broader political context of these donations offers strong grounds for reconsideration of both Derbforgaill's and other women's experiences. Among the wider implications of this study must be the reconceptualisation of female political importance as functional through or in concert with marriage partners, rather than the natal family.