That would be the three American and two Soviet astronauts who flew on the mission. From left to right (in your drawing) they are Donald "Deke" Slayton, Vance Brand, Thomas Stafford, Alexei Leonov and Nikolai Kubasov.

edit: I don't mean to be rude, but you do know the answer is actually in the picture description and the Wikipedia article to which you linked? It really isn't very difficult to find. =)