Board Thread:General Discussion/@comment-4411561-20140325085046

"Titus Mede I" was not the First non-Dragon Born Emperor, because before he siezed power, when Martin Septim The last Septim of the Septim Dynasty died, the Elder Council placed a number of Empeors on the Throne in order to maintain peace in Cyrodiil. the possible last of these "Elder Council Emperors" was "Thules The Gibbering" who was a Nibenese Emperor of Tamriel, before "Titus Mede I" siezed the Throne.

You can find the Information stated on the Elder Scrolls Wikia at Thules the Gibbering's own Wikia Page 