If your user name appeared to be a real first and last name (fictitious or not), your user name has been changed to just your first name. As of May 1, 2018 no full real names are allowed as user names.
r. Vesimies - Aquaman
s. Vihreä Lyhty - Green Lantern
t. Ihmenainen - Wonder Woman
u. Salama - Flash?
v. Teräsmies - Superman
w. Vihreä Nuoli - Green Arrow
x. Musta Kanarialintu - Black Canary?
y. Lepakkomies - Batman
z. Marsilainen Ihmismetsästäjä - Martian Manhunter
Couple notes. Batman has since 80's stuck to the English name, "Lepakkomies" was really only used before that (and very early on just "Lepakko").
Teräsmies is literally "Steelman". "Super" just doesn't translate well, usually it's just left as super; but "Supermies" would've sounded really corny and back then (40's/50's?) they didn't leave anything in English, so they went with "Steelman" (interestingly, I think Stalin was still alive and kicking when they chose the name, kind of odd considering that - I assume phrase "Man of Steel" was already used?).
"Marsilainen Ihmismetsästäjä" is a literal translation that was used earlier (pre-90's or so); it sounded a bit silly (more like Martian Humanhunter), but I kind of prefer it to later "Metsästäjä Marsista", "Hunter from Mars".