Cognomen Diegel (Diegel 
) , all around the world, is quite a rare last name. The last name Diegel is habitual in Germany, where it is quite a rare surname, the United States, where it is a rare surname, and Canada.
| VARIANT | COUNTRY |
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| Diegel | Canada, South Africa, United States, Germany, Hungary |
| jakob diegel DE (b. 1805) |
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| johann gustav diegel (b. 1828) |
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leo diegel professional golfer, US (b. 1899) |
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helmut diegel German politician, DE (b. 1956) |
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| hans-günter diegel German association football player, DE (b. 1936) |
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| ralf diegel German swimmer, DE (b. 1963) |
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| olaf diegel researcher |
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| craig diegel college basketball player (1979–1981) Tennessee |
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| laura diegel author of books on ancient history and literature |
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| moritz diegel |
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| jos diegel |
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