Shaonia was the daughter of Antonius Bayle IV and Lady Shae of Felwithe.

The firstborn child (and therefore rightful heir to the throne of Qeynos) of Antonius the Fourth, Shaonia was removed to The Isle of Erollisi by her mother, Lady Shae, in secret. It was only later in her life that Shaonia was reunited with her father, who left Qeynos to be with her and her mother.

Given Shaonia's known direct lineage to the Bayle line, and Antonia Bayle having grown up on Erollisi and having proved to the Council that she was indeed a Bayle by blood, Shaonia can reasonably be assumed to be a direct ancestor of Antonia Bayle.