For the most part, Trygve’s relationship with his parents was fairly conventional, while that with his brother was constantly strained. Hadrian was Birkir’s first son from an affair he had with Livia Pius, a woman in Imperial City. When he was made aware of his son’s existence, Birkir settled in Imperial City to help raise his son although he never married Livia. She died when Hadrian was eight and, having no family there, Birkir moved them back to Falkreath.
Trygve, a Nord, was born Trygve Wartooth in 4E173, 4th of Rain’s Hand, in a small house just outside of Riften to parents Ysri and Birkir (both deceased). Ysri was a healer and priestess of Mara. Birkir was once a wealthy merchant and trader who traveled extensively but settled down after the birth of his first child, Trygve’s half-brother, Henrik (originally Hadrian*).