Co-captains share the tasks of being the leader of a team equally; they are both captains at the same time. This is somewhat different to an assistant captain who helps the main captain do their job, or a vice-captain who stands in when they are absent or busy.
If, by 'captain', you mean leader, then that is Louis :)
The "A" stands for alternate captain and/or assistant captain.
captain
the lord god
CAPTAIN from the PUNJABI.
Captain
Depends on what you mean by Captain, captain in the military, soccer team, what? Any idea on what the JB stands for?
A Captain of the Horse is an officer's rank in the British Cavalry. A captain is in charge of a company of horsemen and their supporting contingent.
Assistant Captain of the team.
The captain of a ship.
It means captain of a ship
Have a look at a horse