Childebrand I (678 – 743 or 751) was a Frankish duke (dux), illegitimate son of Pepin of Heristal and Alpaida, and brother of Charles Martel.^[1][2][3] He was born in Autun, where he later died. He married Emma of Austrasia and was given Burgundy by his father, becoming a duke.^[4][5] He distinguished himself in the expulsion of the Saracens from Francia alongside his brother when he captured Marseille, one of the largest cities still in Umayyad hands.^[3]

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He was the patron of the continuator of the Chronicle of Fredegar, as was his son Nibelung I or Nivelon.^[2][6]

Some scholars believe that Childebrand was actually the half-brother of Charles Martel, related through his father.^[2][7] His date of death is also contentious, as some sources place his death at 743 while others claim he lived until 751.^[4]