For instance, Lieutenant is often abbreviated Lt. or LT. When that becomes a nickname, how is it written? A second question along side of that one, when writing fiction, is there a space between initials when it's a name (L. T. instead of LT.). Or would it be better to write Ell-tee, which I've seen done before as well. EDIT: I just realized that L. T. won't work since they're not really initials. So ignore the second question.