Cognomen Lambourn (Lambourn 
) , throughout the world, is quite a rare last name. The last name Lambourn is characteristic of New Zealand, where it is quite a common surname, Australia, where it is a rare surname, and the United Kingdom.
| VARIANT | COUNTRY |
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| Lambourn | Australia, South Africa, New Zealand, United Kingdom, United States |
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arthur lambourn New Zealand rugby union player, NZ (b. 1910) |
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| george lambourn English painter, GB (b. 1900) |
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| simon lambourn (born 1927) (b. 1927) |
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| martin lambourn (born 1929) (b. 1929) |
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| jane esther lambourn (born 1931) (b. 1931) |
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| maggie lambourn British rower, GB (b. 1951) |
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| nikolas lambourn (born 1952) (b. 1952) |
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| tamsin lambourn (born 1954) (b. 1954) |
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| charlotte nancy lambourn (born 1956) (b. 1956) |
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| caroline helen lambourn (born 1959) (b. 1959) |
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| emma fanny lambourn (born 1962) (b. 1962) |
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| sarah margaret lambourn (born 1963) (b. 1963) |
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| hugo gavin lambourn (born 1963), GB (b. 1963) |
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| jayne allison lambourn (born 1965) (b. 1965) |
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| suesan barbara lambourn (born 1968) (b. 1968) |
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