Family name Rettler (Rettler 
) , worldwide, is a rare last name. The cognomen Rettler is characteristic of Germany, where it is a rare surname, Austria, and the United States.
| VARIANT | COUNTRY |
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| Rettler | China, United States, Germany, Costa Rica, Austria |
| paschasius hermann rettler German bishop, DE (b. 1915) |
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| aloysia rettler (b. 1911) |
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| ute rettler German politician, DE (b. 1961) |
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| erik f.-j. rettler researcher |
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| holger rettler |
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| markus rettler |
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