The title of Baron Herbert of Castle Island was created once in the Peerage of Ireland on 31 December 1624 for the
Anglo-Welsh soldier, diplomat and poet Edward Herbert, who was created Baron Herbert of Cherbury, in the Peerage of England, on 7 May 1629. Both baronies became extinct on the death of the fourth baron in 1691.
The second English creation of the barony of Herbert of Chirbury was for Henry Herbert on 28 April 1694. On the second baron's death in 1738, the barony became extinct.
Both British creations (21 December 1743 and 16 October 1749) were for Henry Arthur Herbert and subsidiary titles of the earldom of Powis (creation of 1748). This creation of the barony became extinct together with the earldom in 1801.
The UK creation was for Edward Clive, 2nd Baron Clive of Plassey on 18 May 1804. And again, it was a subsidiary title of the earldom of Powis (creation of 1804).
There is a large public house in the village of Chirbury, Shropshire, called The Herbert Arms.
Title succession chart, Barons Powis, Barons Herbert of Castle Island, Barons Herbert of Chirbury, Barons Clive, Earls of Powis, and Marquesses of Powis.