G. Moore:

Esquire is an old  English term that is placed after the name of an 
attorney.  It is still in use today, but many attorneys are moving away 
From its use.  The term can also just be a title appended to a man's 
surname as a formal way to address a letter.  I think it was used more 
commonly for this purpose in the past.  An attorney can be either a lawyer 
or attorney-in-fact under a power of attorney naming another to act on your 
behalf.  Hope this helps.

Jan, Esq.