Board Thread:Lore Discussion/@comment-24810427-20140107220735/@comment-13446185-20140120005904

After looking into the subject Andorak being adopted I've found something

"Uriel Lariat, Cassynder's half-brother, and the child of Katariah I and her Imperial consort Gallivere Lariat"

"Legally, Uriel IV was a Septim: Cassynder had adopted him into the royal family when he had become King of Wayrest."

-Brief History of the Empire, Book III

What that person wrote was most likely a mix up of the lore. Uriel IV (Uriel Lariat), Andorak's father, was the son of Katariah Septim and Gallivere Lariat and was "adopted" (in this context meaning excepted) into the Septim line. Though Uriel IV isn't realy part of the Septim Bloodline he was in fact an "honorary Septim" meaning that his descendents would still have a legitament claim to the throne after the death of the Septim Dynasty.