Cognomen Westmorland (Westmorland 
) , throughout the world, is a rare last name. The cognomen Westmorland is habitual in the United Kingdom, where it is a rare surname, New Zealand, and the United States, where it is a very rare surname. Not in comparison with a country's population, this name is the most popular in the United Kingdom, the United States, and South Africa. Very seldom, Westmorland is the forename as well as the last name.
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| Westmorland | United Kingdom, Canada, Australia, South Africa, United States |
| robert westmorland Peerage person ID=641726 (b. 1510) |
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| christopher westmorland (1535-1601) (b. 1535) |
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| christopher westmorland (1570-1629) (b. 1570) |
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| christopher westmorland (1652-1742) (b. 1652) |
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| thomas westmorland (1662-1737) (b. 1662) |
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| hannah westmorland (born 1686) (b. 1686) |
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| margaret westmorland (1688-1770) (b. 1688) |
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| john westmorland (1689-1773) (b. 1689) |
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| isaac westmorland (1693-1777) (b. 1693) |
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| mary westmorland (1695-1699) (b. 1695) |
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| rachel westmorland Peerage person ID=652528 (b. 1695) |
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| tamar westmorland (1699-1719) (b. 1699) |
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| joseph westmorland (1700-1781) (b. 1700) |
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| thomas westmorland (1701-1701) (b. 1701) |
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| isaac westmorland (1706-1785) (b. 1706) |
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