General Notes

Eustace de Burgh, Baron Tonsburgh, in Normandy, younger brother of Harlowen de Burgh, the ancestor of the Lords Clanricarde, and the numerous families of De Burgh, Burke, and Bourke, had two sons, Serlo, and John, surnamed Monoculus, from having but one eye. [Sir Bernard Burke, Dormant and Extinct Peerages, Burke's Peerage, Ltd., London, 1883, p. 121, Clavering, Barons Clavering]