Was Soap Mactavish Captian Prices son?

No, Soap MacTavish is not Captain Price's son. In the "Call of Duty" series, John "Soap" MacTavish is a close ally and comrade of Captain Price, but their relationship is one of friendship and mutual respect rather than familial ties. They serve together in the Special Air Service (SAS) and work as part of the same team in various missions throughout the games.