Surname Gagern (Gagern 
) , worldwide, is a rare cognomen. The last name Gagern is habitual in Germany, where it is a rare surname, Austria, and Sweden. Measured by absolute frequency, it most frequently occurs in Germany, the United States, and Mexico.
| VARIANT | COUNTRY |
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| Gagern | Germany, Sweden, Austria, Mexico, United States |
| woldemar moritz freiherr von gagern (b. 1655) |
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| claudius moritz von gagern (b. 1696) |
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hans christoph ernst von gagern German politician (1766-1852), DE (b. 1766) |
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friedrich von gagern German soldier, DE (b. 1794) |
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heinrich von gagern President of the Frankfurt Parliament, leader of the German government (1799-1880), DE (b. 1799) |
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| karl christoph gottlieb von gagern DE (b. 1743) |
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ernst von gagern German catholic priest (1807-1865), DE (b. 1807) |
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maximilian von gagern German politician (1810-1911), DE (b. 1810) |
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| hans karl adam von gagern DE (b. 1774) |
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| karoline von gagern DE (b. 1776) |
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| gustav von gagern (b. 1783) |
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maximilian von gagern German diplomat, DE (b. 1844) |
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| moritz von gagern politician (1808-1877), DE (b. 1808) |
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| marie von gagern (b. 1810) |
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| dora von gagern German writer, DE (b. 1824) |
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