So my FH's real name is Daniel, but he always goes by DJ. We're having his best friend officiate the ceremony and I wonder if it'd be weird for his best friend, who always calls him DJ (or, sarcastically, Dan), to call him by his full name? But using DJ throughout the ceremony seems informal (and we're having a formal wedding).
For what it's worth, we put Daniel on the invitations since I'm also using my full name.
Would it be weird to switch back and forth between DJ and Daniel in the ceremony, or should we just pick one and stick with it?