Last name Rau (Rau 
, ラウ 
, راو 
, and others...) , all around the world, is a common cognomen. The last name Rau is characteristic of Germany, where it is quite a common surname, Maldives, and Moldova, where it is quite a rare surname. Measured by absolute frequency, this name is the most popular in Germany, the United States, and India. Much less frequently, Rau is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rau | United States, Romania, India, Germany, Indonesia |
| ラウ | Japan |
| راو | Sudan, Iraq, Saudi Arabia |
| Рау | Kazakhstan, Belarus, Ukraine, Kyrgyzstan, Russia |
| ראו | Israel |
|
johannes jacobus rau German physician, DE (b. 1668) |
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| melusina rau wife of Zeitz lawyer and mayor Siegmund Rau (b. 1619) |
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| regina rau DE (b. 1626) |
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| melusina rau DE (b. 1647) |
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| johann rau DE (b. 1673) |
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| david wilhelm rau 1690-1744; geb. in Ulm (b. 1690) |
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christian rau German jurist, DE (b. 1744) |
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| johann eberhard rau DE (b. 1695) |
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| manuel moliner i rau ES (b. 1700) |
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| wolfgang thomas rau German physician (1721-1772), DE (b. 1721) |
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| joachim justus rau (b. 1713) |
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| johann jakob rau DE (b. 1715) |
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| electus rau (b. 1718) |
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| johann albrecht rau DE (b. 1726) |
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karl heinrich rau German economist (1792-1870), DE (b. 1792) |
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