Chlothar (Latin Chlotharius; French Clotaire) is a Germanic given name, which evolved into the later form Lothair (Lotharius).
After the death of Chlothar in 673, Theuderic III, his youngest brother, inherited his kingdoms, but a faction of prominent Burgundian nobles led by Saint Leodegar and Adalrich invited Childeric to become king in Neustria and Burgundy.
During Chlothar's reign, the Franks had made an attack on northwestern Italy, but were driven off by the Lombard king Grimoald near Rivoli.
In 613, several leading magnates of Austrasia and Burgundy abandoned Brunhilda, the great-grandmother and regent of their king, Sigebert II, and turned to Chlothar II of Neustria for support, promising not to rise in defense of the queen-regent and recognizing Chlothar as rightful regent and guardian of the young king.