In "Star Trek" what is Chekov's first name?

Pavel Andreievich Chekov is a fictional character in the "Star Trek" universe. Walter Koenig portrayed Chekov in the second and third seasons of the original "Star Trek" series and the first seven "Star Trek" films. Anton Yelchin portrayed the character in the 2009 "Star Trek" reboot film and two sequels, "Star Trek Into Darkness" and "Star Trek Beyond".

Chekov was born in 2241 in Russia and is a young and naïve ensign who first appears on-screen in The Original Series’ second season as the Enterprise's navigator. According to Roddenberry, he is "an extraordinarily capable young man—almost Spock's equal in some areas. An honor graduate of the Space Academy." Chekov also substitutes for Mr. Spock at the science officer station when necessary. His promotion to lieutenant for "Star Trek: The Motion Picture" brings with it his transfer as the ship's tactical officer and chief of security.