Surname Ilgenfritz (Ilgenfritz 
) , in all the world, is quite a rare cognomen. The cognomen Ilgenfritz is habitual in Austria, where it is quite a rare surname, Germany, where it is a rare surname, and the United States. Very seldom, Ilgenfritz is the forename as well as the last name.
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| Ilgenfritz | Brazil, Canada, United States, Germany, Austria |
| charles h. ilgenfritz Medal of Honor Recipient (1837-1920), US (b. 1837) |
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| heinrich ilgenfritz German painter (1899-1969), DE (b. 1899) |
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| clóvis ilgenfritz Brazilian architect (1939-2019), BR (b. 1939) |
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| william h. ilgenfritz American Anglican bishop (born 1946) (b. 1946) |
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| mark ilgenfritz American football defensive end, US (b. 1952) |
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| wolfgang ilgenfritz Austrian politician, AT (b. 1957) |
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| heidi ilgenfritz DE (b. 1968) |
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| james ilgenfritz American musician, US (b. 1978) |
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| henriette ilgenfritz |
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