[4] Seventeenth-century Spanish genealogist Luis Bartolomé de Salazar y Castro gave Ardabast's father as Athanagild, the son of Saint Hermenegild and Ingund, and his mother as Flavia Juliana, a daughter of Peter Augustus and niece of the Emperor Maurice.

[5] This imperial connection is disputed by Christian Settipani, who says that the only source for Athanagild's marriage to Flavia Julia is José Pellicer, who he claims to be a forger.

[6] After his predecessor Wamba had taken the monastic habit while on the verge of death, he was forced to retire from the kingship on 14 October 680, even though he recovered, and enter a monastery.

Nonetheless, some historians have seen in the rapidity of Erwig's unction after the king had received the penitential sacrament evidence for a pre-planned palace coup.

The councils confirmed Erwig's legitimacy for a second time and wrote many laws to protect the life and rule of the king and his family, including that of his queen, Liuvigoto.