Board Thread:Lore Discussion/@comment-71.58.163.238-20130703034923/@comment-96.253.6.16-20170420013303

There's another possibility:

In 1E 420, Olaf One-Eye captured Numinex and became High King of Skyrim. Though Olaf used Shouts, he was not Dragonborn (and lucky for Olaf, it would be 3 more years before Jurgen Windcaller returned and said only monks were allowed to use Shouts).

In 1E 482, Wulfharth became High King of Skyrim. Wulfharth WAS Dragonborn.

The implications for Numinex are pretty clear.