Surname Coolbaugh (Coolbaugh 
) , all over the world, is quite a rare family name. The surname Coolbaugh is habitual in the United States, where it is a rare surname, Canada, where it is a very rare surname, and Costa Rica.
| VARIANT | COUNTRY |
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| Coolbaugh | Costa Rica, Mexico, United States, Canada, Venezuela |
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william f. coolbaugh American politician (1821-1877), US (b. 1821) |
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| mary ellen coolbaugh second wife of judge Melville Fuller (b. 1845) |
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| jane eliza coolbaugh US (b. 1853) |
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| walter w. coolbaugh Recipient of the Navy Cross (1914-1942), US (b. 1914) |
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| bob coolbaugh American football player (1939-1985), US (b. 1939) |
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| scott coolbaugh American baseball player, US (b. 1966) |
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| mike coolbaugh American baseball player, US (b. 1972) |
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| mark f. coolbaugh geothermal energy researcher |
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| crystal l. coolbaugh researcher ORCID ID = 0000-0002-1825-598X |
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| michael j coolbaugh researcher |
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