Guild Wars 2

Hi, so in sPvP after someone dies (or is downed?) on the right hand side text will appear saying “John killed James” with their team color and profession symbol.

My question is; how is the name chosen? Is it who has done the most damage to the victim? Is it final blow?

Any information appreciated.

The messages on the side refer to final blow, the points are awarded to whomever did a certain amount of damage to the target.