Surname Decoste (Decoste 
) , all over the world, is quite a rare cognomen. The cognomen Decoste is habitual in Canada, where it is quite a rare surname, Haiti, where it is a rare surname, and New Zealand. Measured by absolute frequency, the name is most common in Canada, the United States, and Haiti.
| VARIANT | COUNTRY |
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| Decoste | Canada, France, Haiti, New Zealand, United States |
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david decoste politician in Massachusetts, US, US |
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| patrick decoste American musician, US (b. 1978) |
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| jesse decoste Canadian actor, CA |
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| jonathan decoste Canadian cinematographer |
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| jared b decoste researcher |
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| christina decoste researcher |
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| ryan decoste researcher |
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| rachelle decoste Ph.D. The University of North Carolina at Chapel Hill 2004 |
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| dennis martin decoste Ph.D. University of Illinois at Urbana-Champaign 1994 |
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| chelsea decoste researcher |
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| christopher decoste |
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| kevin decoste American actor, US (b. 1995) |
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