It stands for hope (Kryptonians Readers x crossover story)

on the deepness of space there was once a planet known as Krypton, wich habbitants were blessed with a great intelligence that they use to create an advanced society, knowed across the galaxy by their advanced thechnology, the Kryptonians Lived under an Era of peace until the inevitable end of their Planet, two babies the last kryptonian survivors were send away to an unknown planet to assure their safety