Last name Umbach (Umbach 
) , in all the world, is quite a rare cognomen. The family name Umbach is characteristic of Germany, where it is quite a rare surname, Switzerland, and Malta. Not in comparison with a country's population, it is the most numerous in Germany, the United States, and Switzerland.
| VARIANT | COUNTRY |
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| Umbach | Germany, Belgium, Switzerland, United States, Canada |
| jonas umbach German painter and engraver (1624-1693), DE (b. 1624) |
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| julius umbach DE (b. 1815) |
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| johann christoph umbach (b. 1821) |
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| josef umbach association football player, DE (b. 1888) |
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karl-heinz umbach German physicist, DE (b. 1944) |
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wolf-rüdiger umbach German association football referee, DE (b. 1945) |
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eberhard umbach physicist, DE (b. 1948) |
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| rolf umbach German theologian and writer (1926-2018), DE (b. 1926) |
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| klaus umbach German culture journalist, DE (b. 1936) |
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| ernst umbach (b. 1927) |
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| claus umbach (b. 1930) |
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| arnold umbach American baseball player, US (b. 1942) |
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| eberhard umbach DE (b. 1940) |
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| martin umbach German actor and voice actor, DE (b. 1956) |
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| ulrich umbach (b. 1950) |
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