kon-el/conner kent is the first superboy, first debuting in the 1990 superman comics. hes a half kryptonian half human clone of superman and is from S.T.A.R./CADMUS/N.O.W.H.E.R.E labs depending on the version. Who is is other human donor tho... MYSTERY MUSIC

• Superman: Reign of the Supermen[https://readcomiconline.li/Comic/Superman-Reign-of-the-Supermen] (his first extended appearance; sets the tone for much of his pre-crisis personality)
• Superboy 1994 ( issue 59 is impt)
• Convergence Superboy
• Superboy 1 (hes in a tshirt now instead of the cool leather jacket :/)
• Superboy 2 (note: this is an alternate version of kon who has nothing to do w the previous ones and was retconned. this superboy is in new 52 teen titans but the one in young justice 2019 superboy is the 'original' one XP)