The date of foundation of the church in Llaniestyn, Anglesey, is unknown, although it is thought that St Iestyn, a nephew of the Anglesey saint St Cybi, established a religious community in this place in the 7th century.
The date of foundation of the church in Llaniestyn, Anglesey, is unknown. Geraint Jones, author of a 2006 guide to the churches of Anglesey, notes that it is thought that St Iestyn, a nephew of the Anglesey saint St Cybi, established a religious community in this place in the 7th century.