Winona Kirk was the wife of Starfleet officer George Kirk and the mother of George Samuel Kirk and James T. Kirk. When George was an adolescent, he owned a PX70 motorcycle and Kirk would put Winona on the back of it, which would drive her nuts. (Star Trek Beyond) In 2233, she was aboard the USS Kelvin while her husband served as the starship's first officer. (Star Trek) She had four grandchildren, three from her son George Samuel, and one from her son James, as well as one miscarried child. (TOS: "What Are Little Girls Made Of?" , "The Paradise Syndrome" ; Star Trek II: The Wrath of Khan)