Cognomen Casteel (Casteel 
) , all around the world, is quite a common surname. The family name Casteel is characteristic of the United States, where it is quite a rare surname, Netherlands, where it is a rare surname, and New Zealand. In absolute terms, it is commonest in the United States, Netherlands, and Canada.
| VARIANT | COUNTRY |
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| Casteel | Germany, Philippines, United States, Canada, Netherlands |
| gerard casteel (b. 1667) |
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homer casteel American politician, US (b. 1878) |
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lauren young casteel african-American activist (b. 1953) |
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| homer casteel jr. American artist and writer, US (b. 1919) |
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trey casteel American pornographic film actor, US (b. 1974) |
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joshua casteel US Army soldier, lecturer, and writer (1979-2012), US (b. 1979) |
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| richard w. casteel affiliated with the Department of Anthropology, University of Washington, Seattle (b. 1945) |
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| jeff casteel American football coach, US (b. 1962) |
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| clare casteel researcher, ORCID id # 0000-0003-3678-0187 |
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| bob casteel college basketball player (1957–1960) Florida State |
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| van casteel Dutch educator |
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| seth casteel American photographer, US |
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| sarah phillips casteel (b. 1974) |
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| jordan casteel American Visual Artist, US (b. 1989) |
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| ryan casteel American baseball player, US (b. 1991) |
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