Beidaud () is a commune in Tulcea County, Northern Dobruja, Romania. The commune includes three villages: Beidaud, Neatârnarea (Caildere until 1908), and Sarighiol de Deal.
The commune's name is of Turkish origin, being a compound of the words bey and Daut, derived from David. Thus, the name means "village of the bey David".Laura-Diana Cizer, Toponimia județului Tulcea, p.193. Editura Lumen, 2012, .
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