Last name Trueblood (Trueblood 
) , globally, is quite a rare surname. The family name Trueblood is habitual in the United States, where it is a rare surname, New Zealand, and Costa Rica. Measured by absolute frequency, the name is most common in the United States, Canada, and the United Kingdom.
| VARIANT | COUNTRY |
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| Trueblood | United Kingdom, United States, Nigeria, Canada, New Zealand |
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benjamin franklin trueblood American pacifist, US (b. 1847) |
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thomas trueblood college professor, college golf coach, author, US (b. 1856) |
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| jonathan trueblood (b. 1832) |
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| wilbur trueblood American architect, US (b. 1874) |
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| mary esther trueblood American mathematician, US (b. 1879) |
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| d. elton trueblood American theologian (b. 1900) |
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kathryn trueblood American writer (b. 1960) |
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| ellen trueblood American journalist, mycologist, and environmentalist, US (b. 1911) |
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| pauline trueblood (b. 1901) |
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| ted trueblood American writer, US (b. 1913) |
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| alan s. trueblood American academic specializing in Spanish and Latin American poetry (1917-2012), US (b. 1917) |
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| kenneth nyitray trueblood American chemist (1920-1998), US (b. 1920) |
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| guerdon trueblood Costa Rican screenwriter, producer, director, and actor, CR (b. 1933) |
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| paul trueblood American pianist, US (b. 1935) |
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| mark trueblood American astronomer, US (b. 1948) |
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