Possible Clues:

• Junior, perhaps
• One is called after someone
• One called for this, perhaps
• Frantically seek a man, one of the same denomination
• He would answer when you are called
• One's similarly entitled to label drink
• John vis-a-vis other Johns, for example
• Person with the identical monicker
• Ed Koch, Ed Ames, or Ed Asner, e.g.
• One with a grip on the same handle?