(noun) a person of rank, power, or influence in a particular field
(noun) a male member of a royal family other than the sovereign (especially the son of a sovereign)
Definitions for Tristan
(noun) (Middle Ages) the nephew of the king of Cornwall who (according to legend) fell in love with his uncle's bride (Iseult) after they mistakenly drank a love potion that left them eternally in love with each other