User blog comment:Godisme/Wizards vs. Hunters/@comment-78.146.104.240-20130719164829/@comment-7418318-20130719195738

Let's see the current known mage marriages:

4 pairs of mage + non-mage: Macao & ?, Wakabe & ?, Layla & Jude and Gildarts & Cornelia.

1 pair of mage + mage: Bisca & Alzack.

So what exactly makes you think Ul's husband has to be a strong mage? He might be (have been?), but just because his wife was a mage doesn't even indicate him being a mage, much less make it likely.