Chlothar IV

Chlothar IV (died 718) was the king of Austrasia from 717 until his death. He was a member of the Merovingian dynasty, and was installed by Charles Martel, a contender for the office of mayor of the palace, in opposition to Chilperic II, whose rule was thereby restricted to Neustria. This marked the first time since 679 that the kingdom of the Franks was divided. Following Chlothar's death, it was reunited under Chilperic.

Chlothar's parentage and the exact dates of his reign are uncertain, since no primary source gives them explicitly. Documents from Chlothar's reign place him on the throne between 28 June 717 and 24 February 718. A Frankish king-list from the reign of Charles the Bald a century and a half later gives his reign a length of one year, which is consistent with all other evidence. His reign began no earlier than 21 March 717 and was over by 18 May 718. Although it has been suggested that he was not a true Merovingian but a puppet king of convenience, this is unlikely, since it was the need for Merovingian legitimacy that compelled Charles Martel to name a rival king in the first place. Chlothar's father must have been either Theuderic III (died 691), in which case he was about 35 years old when he came to the throne, or Childebert III (died 711), in which case he was probably closer to 20.