Perhaps through an item like a mask, or alternatively cosmetics and potentially even a skill feat to match. But, if it's even possible. I'd love the ability to hide the name of my characters. This could be good for a rouge that sidelines in a bit of highway robbery. Or a polymorph etc.
Naturally, this can be done through RP, and I'd like to say we trust absolutely everyone to never metagame information. But the reality is we're all human right. Ultimately one can work it out (whos-who) but, at least its a first stop barrier that makes it easier for everyone to RP hiding your true identity when required.
Divinity