Family name Rosenau (Rosenau 
, Розенау 
, רוזנאו 
) , across the world, is quite a rare surname. The family name Rosenau is habitual in Germany, where it is quite a rare surname, Netherlands, where it is a rare surname, and the United States. Measured by absolute frequency, it is commonest in Germany, the United States, and Brazil. Very seldom, Rosenau is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rosenau | Germany, Poland, Brazil, Canada, United States |
| Розенау | Kazakhstan, Ukraine |
| רוזנאו | Israel |
|
milton j. rosenau American physician, US (b. 1869) |
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| david sylvester mayer von rosenau Austrian teacher and local historian, AT (b. 1851) |
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| berta rosenau holocaust victim, b. 1857-06-05, DE (b. 1857) |
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| alexander rosenau holocaust victim, b. 1861-09-02, PL (b. 1861) |
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| william rosenau American rabbi (b. 1865) |
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| jeanette rosenau holocaust victim, b. 1867-12-13, AT (b. 1867) |
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| julius rosenau holocaust victim, b. 1869-09-06, CZ (b. 1869) |
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| betty rosenau holocaust victim, b. 1872-07-28, DE (b. 1872) |
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| frieda rosenau Holocaust victim, b. 1872-00-00, CZ (b. 1872) |
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| moritz rosenau holocaust victim, b. 1873-05-07, DE (b. 1873) |
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| else rosenau holocaust victim, b. 1875-09-13 (b. 1875) |
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| grete rosenau holocaust victim, b. 1883-03-01, DE (b. 1883) |
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| ernst rosenau holocaust victim, b. 1895-09-06, DE (b. 1895) |
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| helen rosenau German university teacher, DE (b. 1900) |
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| wilhelm rosenau (b. 1898) |
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