'''Grabau ''' is a surname. Notable people with the surname include:
* Aaron Grabau (born 1978), Australian basketball player * Amadeus William Grabau (1870–1946), geologist * Charles Grabau, jurist * Johannes Andreas August Grabau (1804–1879), theologian * Lorenzo Grabau (born 1965), financier
==See also== * Dorsum Grabau, geological feature on the moon * Grabau, Lauenburg * Grabau, Stormarn
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