Captain James T. Kirk (aka William Alan Shatner) born in 1931 and Mr. Spock (aka Leonard Simon Nimoy) also born in 1931 are both Jewish.
William Shatner was born in Montreal Canada to Anna and Joseph Shatner who were immigrants from Poland and Hungary. In addition to his role as Captain Kirk, Shatner has gained fame as Police Seargent TJ Hooker, Denny Crane on Boston Legal, and the pitchman for Priceline. Shatner was raised as a conservative Jew.
Leonard Nimoy was born in Boston, MA to Yiddish speaking parents Nimoy spent much of his early career doing small parts in minor roles in B-Movies and shows such as Dragnet, Zombies of the Stratosphere and the Twilight Zone. Nimoy was raised as an Orthodox Jew.
Vulcan Salute has Jewish Origins
The Vulcan Salute (Pictured above), was created by Leonard Nimoy and he based it on the Priestly Blessings performed by Jews during important Holidays. With both hands, thumb to thumb in this same position, representing the Hebrew letter Shin (ש), which has three upward strokes similar to the position of the thumb and fingers in the salute. The letter Shin here stands for Shaddai, meaning "Almighty (God)", and has a special significance in Judaism. Nimoy wrote that when he was a child, his grandfather took him to an Orthodix synagogue. He saw the blessing performed, and was very awed by it.
The greeting "Live Long and Prosper" is also related to the Jewish and Muslim greeting ('Shalom Aleichem' in Hebrew and' Salaam Alaykim' in Arabic), meaning "peace be upon you".