Lana Lang.
Clark Kent dies!
Clark Kent finds out that Lex has been researching him in the Season 3 episode of "Covenant."
Kent Clarke died in 1994.
She found out officially about Clark's superhuman powers in Season 6's Episode 16 which was titled "Promise" but she didn't find out about him being from another planet until Season 6's Episode 22 which was the Season Finale which was titled "Phantom."
Clark Kent was created in 1938.
Superman's human name given to him by Martha and Johnathan Kent is Clark Kent. Superman's Kryptonian name given to him by Jor-El and Lara Lor-Van is Kal-El.
Superman's secret identity as a reporter is Clark Kent.
They both kind of got together in Season 2 but they were officially together for a few episodes in Season 5.
Clark kent
Clark Kent - producer - was born in 1966.
Clark was Martha Kent's maiden name.
Stories in the comic books usually have it happen where he starts being able to do that at the age of 18. He will not do it as Clark Kent because he would not want to give away he is Superman.