Duke Fara (c610-641) was an opponent of Siegbert III.
FARA (-killed in battle 641). Dux in Austrasia. Fredegar records that "Faram filio Chrodoaldo" rebelled against King Sigebert, helped by Radulf Duke of Thuringia, but was killed. See Chrodoald at MedLands, visited Aug. 16, 2013.
Many poorly constructed Internet genealogies assume from his name that he was a woman and show him as the wife of different Bavarian dukes.