Marty McFly Jr.

Martin Seamus "Marty" McFly, Jr., born in 1998, was the son of Marty and Jennifer McFly, and had a sister named Marlene.

At 17, Marty Jr. looked almost identical to his father at the same age — this allowed Marty, from 1985, to pretend to be his son in 2015. However, Marty Jr. was not exactly the same. Whilst both he and his sister strongly resembled their father a lot more than their mother, Marty Jr had brown eyes like his mother, as opposed to blue eyes like his father.