Last name Utt (Utt 
, Uutt 
, אוט 
) , throughout the world, is quite a rare family name. The cognomen Utt is habitual in Marshall Islands, where it is a common surname, Estonia, where it is quite a rare surname, and Trinidad and Tobago. Not in comparison with a country's population, it is the most numerous in the United States, Marshall Islands, and Nigeria. Very seldom, Utt is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Utt | Estonia, China, United States, Nigeria, Marshall Islands |
| Uutt | India, China |
| אוט | Israel |
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james b. utt American politician (1899-1970), US (b. 1899) |
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| adelbert l. utt American politician from Wisconsin (1856-1936), US (b. 1856) |
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| kenneth utt American producer (1921-1994), US (b. 1921) |
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| olaf utt Estonian journalist, EE (b. 1929) |
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| ben utt American football player, US (b. 1959) |
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| _ utt college basketball player (1989–1989) Brown |
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| age utt researcher |
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| nick utt college basketball player (1956–1956) Oregon |
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| hannah pearl utt American director, writer, and actress |
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| kainen utt researcher |
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| age utt |
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