Cognomen Penix (Penix 
) , all around the world, is quite a rare surname. The last name Penix is habitual in the United States, where it is a rare surname, Philippines, where it is a very rare surname, and New Zealand. In absolute terms, the name is most common in the United States, Philippines, and Canada.
| VARIANT | COUNTRY |
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| Penix | Canada, Philippines, Brazil, New Zealand, United States |
| amanda penix Miss Oklahoma Teen USA 1997, Miss Oklahoma USA 2000, 1st runner-up to Miss USA 2010, US (b. 1978) |
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| kevin penix American politician |
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| jonathon penix researcher |
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| jeff penix college basketball player (1986–1989) Colorado |
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| jim penix college basketball player (1969–1970) Bowling Green State |
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| elizabeth a penix researcher |
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| michael penix jr. American football quarterback, US |
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