Okay, numbers like 423 and 426, 243 and others may have been references to Bible verses like in Leviticus, for themes in the series. The most known riddle of the Sphinx also has 4, 2 and 3. This could just be a coincidence. But the Sidero connection is definitely deliberate as it's elaborate in connections.Sidero comes from a Greek term for 'iron.' Maxine is like a feminine and french version of Maximus. Apparently, an old reddit username u/carless-metal-423 refers to a type of steel, or maybe if I remember right, something in the Alien mythos (it's vague).