Cognomen Delaval (Delaval 
, Делаваль 
) , around the world, is quite a rare surname. The last name Delaval is characteristic of Belize, where it is quite a rare surname, France, and Belgium, where it is a rare surname. Measured by absolute frequency, it most frequently occurs in France, India, and Belgium. Much less frequently, Delaval is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Delaval | France, Brazil, United States, India, Belgium |
| Делаваль | Ukraine |
| john delaval Sheriff of Northumberland; (1498-1562) (b. 1498) |
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| george delaval (b. 1494) |
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| ralph delaval English gentry, High Sheriff of Northumberland (c.1576–1628) (b. 1576) |
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| john delaval English politician, died 1652 (b. 1579) |
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ralph delaval English naval officer (1641-1707) (b. 1641) |
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| robert delaval English politician (b. 1600) |
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| william delaval 6th son of Sir Ralph Delaval of Seaton Delaval, GB (b. 1616) |
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george delaval Royal Navy admiral (b. 1667) |
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| ralph delaval English landowner and politician; (1622-1691) (b. 1622) |
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| elizabeth delaval (1626-1670) (b. 1626) |
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francis blake delaval British Royal Navy officer and Member of Parliament (1692–1752) (b. 1692) |
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| mary delaval 1645 Credenhall, England - (b. 1645) |
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| robert delaval (1647–1682) (b. 1647) |
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| elizabeth delaval memoirist and Jacobite agent (b. 1649) |
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| sir john delaval, 3rd baronet English politician (b. 1654) |
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