Cacht was a Old Irish feminine given name used during the medieval period.
People
Cacht dercu Corco Cullu, Queen of Connacht, fl. late 7th century. Cacht ingen Cellaig, Queen of Ailech, fl. late 7th century Cacht ingen Ragnaill, Queen of Munster or Queen of Ireland, married 1032, died 1054. Cacht Ni Morda, Queen of Ui Muirdeagh, fl. 1114. Cacht Bean Ui Raighilligh, died 1231.
See also List of Irish-language given names
External links http://medievalscotland.org/kmo/AnnalsIndex/Feminine/BenMuman.shtml