Theory: Taborlin the Great is Iax

Proposal
Iax and Taborlin the Great could be the same person if Taborlin the Great is the first Lackless's husband.

Reasoning
If the first Lackless go their name from when Iax gave away/they inherited the box* it wouldn't be too farfetched to think that Iax was close to the family. If this was the case then it could mean that he actually was her husband. Assuming Taborlin is her husband it means that Taborlin and Iax is the same person.

* Iax had the box since he stole the moon