Kantos Kan from the Disney Film
They met while imprisoned by the cruel Warhoons, who made them fight one another to the death; they avoided this by prolonging the fight until the Warhoons grew bored and left the arena. Afterwards, they fled from the Warhoons and went their separate ways. Kantos Kan made it out to Zodanga, where he became an air scout as a cover for his search for Dejah Thoris.
Kantos Kan was the father of a son, Djor Kantos, and it was his and John Carter's hope that Djor Kantos and Tara of Helium would eventually marry. The young people were good friends and had no objection to the plan - until they fell in love with other people. Fortunately it all worked out in the end.