Future Trunks

Future Trunks is the Saiyan and the Human hybrid son of Vegeta and Bulma from an alternate timeline. By the time Present Trunks was born, the timeline had been altered by Future Trunks' and Cell's trips to the past had occurred. Therefore, the two Trunks had completely different lives (as opposed to those who lived before the time machines arrived – they lived the exact same lives as their counterparts until the point at which the two timelines diverge, three years before the Androids).