House of Trevor
- Coat of Arms
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House of Trevor
Lords of Brynkinalt
Barons Trevor of Rostrevor
Viscounts Dungannon
- Cadet Branches
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House of Pennant
Lords of Penhryn Castle -
House of Hampden-Trevor
Lords of Trevallyn and Plas Teg
Barons Trevor of Bromham
Viscounts Hampden
3rd Baron Trevor assumed by Royal licence additional surname and arms from maternal cousins of Hampden family in 1754 as successor to their estates -
House of Trevor-Roper
Lords of Plas Teg
Matrilineal branch