George Samuel Kirk, Jr. (Kelvin timeline)

George Samuel Kirk, Jr. was the eldest son of Winona and George Samuel Kirk Sr., and brother of James T. Kirk. He was born on 12 August 2230. 

Kirk's father died in 2233 at the hands of the Romulan miner Nero, on the same day that his brother James was born. Eventually Winona remarried to a man named Frank. Both George and his younger brother found living with Frank to be intolerable, and George eventually ran away from home - with his younger brother Jim following him in their father's antique Corvette that Frank was going to sell while Winona was off world.