Cognomen Trenchard (Trenchard 
, Тренчард) , around the world, is quite a rare family name. The cognomen Trenchard is characteristic of the United Kingdom, where it is a rare surname, Canada, and Australia. Measured by absolute frequency, it is the most numerous in the United Kingdom, the United States, and Canada. Much less frequently, Trenchard is the forename as well as the last name.
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| Trenchard | United Kingdom, Canada, Australia, France, United States |
| john trenchard (1482-1527) (b. 1482) |
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| george trenchard English politician (1548-1630) (b. 1548) |
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| hugh trenchard Peerage person ID=595697 (b. 1571) |
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| george trenchard English politician (c.1575-1610) (b. 1575) |
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| thomas trenchard English politician (b. 1582) |
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| john trenchard politician (b. 1586) |
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john trenchard English politician, GB (b. 1649) |
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| john trenchard (1618-1667) (b. 1618) |
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| thomas trenchard (b. 1615) |
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| thomas trenchard (1640-71) of Lytchett Matravers, Dorset (b. 1640) |
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| henry trenchard politician (b. 1652) |
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| john trenchard Peerage person ID=716098 (b. 1658) |
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| oliver trenchard (1662-1746) (b. 1662) |
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| john trenchard British politician (1662–1723) (b. 1662) |
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| philip trenchard English gentry (1663/4–1743) (b. 1663) |
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