I don’t recall this character.
According to the IC wiki:
“Before your Rider materialized fully formed from the ethers like Moratensis from his fountain, I expected to live my life as my father and grandfather before me.— Orrin to Nasuada, Eldest, "A Maze of Opposition".
Moratensis was a man who, in myth, materialized out of an enchanted fountain when a maiden wished for a perfect husband. The materialisation of Moratensis is considered an example of wild magic in Alagaësia.