Champs share quotes....is there a secret lore connection? >_>

Ok....sooooo I've noticed that there are some champs that share the same "quotes". For example Mordekaiser and Evellyn (they share a lot of quotes actually ..) and I think they are kinda related in the main lore or something (sorry, I don't read the lore of champs I don't use) BUT...here is the things....Rengar and Vel'koz (LLLLLAAAAZHEEER BEAAAAAMSHHHHHH!!!!) share the quote "Lets see what they are made off" and they say it in the same way and tone actually...now I've read a pretty crazy theory that Vel'koz is actually Rengar's missing eye...of course its crazy as hell but maybe...idk, since Kha'zix (who I belive was the one who tooked it) its from the void...and knowing the void is a pretty nut house...YOU! points at you....what do YOU think!? >>