In 515, Amalasuntha married Eutharic (c. 480 – 522), an Ostrogoth noble of the old Amali dynasty who had been previously living in the Arian Kingdom of Hispania. Her husband was the son of Widerich (born c. 450), grandson of Berismund (born c. 410), and great-grandson of Thorismund (died after 400), king of the Ostrogoths c. 400. It was important to Amalasuntha's father, Theoderic the Great, that she marry into a legitimate royal family, lest her own family's legitimacy be questioned.
She was very much an intellectual, and was well known for her extensive knowledge, which included the study of three languages, Latin, Greek and Gothic. In addition, she was a student of philosophy and was said to possess the wisdom of Solomon. Amalasuntha was also described in her day as possessing all of the central Roman virtues expected of a noble woman: Happiness, fertility, and patience, although more emphasis was placed on her virtues within the political realm versus the feminine, something that separates her from other Ostrogoth princesses.