Don't give out any clues to personal info through any means
I sincerely feel it is better NOT to use real names as usernames, and it is better not to give any type of personal info on Wikipedia, either on talkpage or on userpage, be it about profession/qualification/nationality/ethnicity/belief/whatever. i.e. one should only use cosmopolitan looking usernames and should not put any personal symbols etc. on userpages. Usernames can be changed on request. Please see WP:Username change if you want to get your username changed.