Family name Steinau (Steinau 
) , all over the world, is quite a rare cognomen. The last name Steinau is characteristic of El Salvador, where it is quite a rare surname, Germany, where it is a rare surname, and Austria. Measured by absolute frequency, it is commonest in Germany, the United States, and El Salvador.
| VARIANT | COUNTRY |
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| Steinau | Germany, Belgium, Austria, El Salvador, United States |
| adam heinrich von steinau German general, DE (b. 1653) |
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| julius heinrich steinau (b. 1807) |
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| rosalie steinau (b. 1827) |
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| hans-ulrich steinau German physician, DE (b. 1946) |
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| martin steinau researcher |
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| christoph steinau DE (b. 1975) |
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| arne steinau |
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| anna elisabeth schwanemann zu steinau |
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Mr, Jens, Todd, Nils, Noah, Elke, Eric, Fate, Faye, Mardi, John, Molly, Sarah, Susan, Andre, Angie, Armin, Casey, Bobby, Karin, Katie, Sandy, Lisa, Lars, Gaby, Ms, Max, Kay, Kim, Dan, Jan, Jay, Tom, Uwe, Marc, Mary, Matt, Alex, Andy, Anja, Adam, Bill, Karl, Kurt, Paul, Rick, Klaus, and Paula