Surname Mclachlan (Mclachlan 
) , throughout the world, is a common family name. The family name Mclachlan is characteristic of New Zealand, where it is quite a common surname, Reunion, and Australia. Measured by absolute frequency, it is the most numerous in the United Kingdom, Australia, and the United States.
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| Mclachlan | United Kingdom, United States, Australia, New Zealand, Canada |
| eleanor mclachlan (born 1764) (b. 1764) |
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alexander mclachlan Canadian poet, GB (b. 1818) |
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john mclachlan New Zealand politician, NZ (b. 1840) |
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| charles mclachlan (1795-1855) businessman (b. 1795) |
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| juliana mclachlan mother of First Lady Julia Tyler, US (b. 1799) |
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james mclachlan American politician (1852-1940), US (b. 1852) |
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| elizabeth riddell mclachlan (1803-1869) (b. 1803) |
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| lachlan mclachlan (1810-1885) civil servant (b. 1810) |
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peter mclachlan Australian politician (1867-1929), GB (b. 1867) |
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james mclachlan Australian politician, AU (b. 1871) |
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alexander mclachlan Australian politician, AU (b. 1872) |
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j. m. mclachlan British politician (b. 1873) |
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| john mclachlan Catholic bishop (b. 1826) |
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| christiana ann mclachlan (b. 1817) |
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| robert mclachlan British entomologist, GB (b. 1837) |
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