Galswintha and Chilperic were married at Rouen in 567, but soon afterward she was murdered at the instigation of Chilperic's mistress Fredegund, who then married him.
Her death aroused the enmity of her sister Brunhild against Chilperic, brining about 40 years of warfare between the Frankish kingdoms of Austrasia and Neustria.
She died in Neustria in 568.