[2] Jameston in the 11th century was a manor, part of the large estate of Manorbier, and was granted to Odo de Barri, the grandfather of Giraldus Cambrensis, for services relating to the Norman conquest.

[2] An Originalia Roll of 1330 mention several citizens of Jameston (described as a “township”) whose chattels are valued.

Jameston is mentioned two years later in an order to Richard Simond, steward of Pembroke, in an argument over the ownership of land.

[3] The de Barri line ended in 1392 and the lands were sold to the Dukes of Exeter, but reverted to the crown in 1461.

[2] A chapel was marked on a 1578 map[4] and there was an annual fair in the 16th century (held on St James's Day[5]).