 He asks her to marry him just before the Klingons arrive to try and kill Stemple.The same personnel record gives Spock's full name as S'chn T'gai Spock and his father as S'chn T'gai Sarek.Spock's family name has never been revealed on screen and only referred to as "unpronounceable" to humans (in the episodes "" and "Journey to Babel").