From A Wiki of Ice and Fire
Minisa Whent by DaenatheDefiant
|Title||Lady of Riverrun|
|Allegiance|| House Whent|
|Spouse||Lord Hoster Tully|
|Book(s)|| A Game of Thrones (mentioned)|
A Clash of Kings (mentioned)
A Storm of Swords (mentioned)
Appearance and Character
Minisa had soft hands and a warm smile.
As a young woman, Minisa wed Hoster Tully, the Lord of Riverrun. At the time Minisa married Hoster, House Whent was the strongest vassal of House Tully. She gave birth to four sons and two daughters, though only Catelyn, Lysa, and Edmure survived infancy. Minisa died in childbirth with her fourth son, who also died shortly after. Catelyn remembers that after she died "some of the life had gone out of [her] father."
The books make no mention of Minisa's relation to other members of House Whent.