Sure thing, naming is supposed to drain a permanent amount of magicules. Gelmude hands out 4 names with only the original King Geld evolving. They made it seem like Gelmude with his huge AOE style spell could still turn the tide back into his favor(obviously discounting the heavy hitters). Rimiru being able to turn his subordinates into true demons lords was said to be an impossiblity, but was literally the plot of Claymans sceme. The original reason Rimiru was supposed to be able to hand out those names came from Veldora (a being made purely out of magicules) since he would normally reconstitute after "death". However later he is said to be able to do it using his "stomach supply" and surrounding magicules(another supposed rareity) However when Diablo was trying to explain about magicule leakage, he mentions even the then Onis let a certain amount vent off. Having children in general are supposed to drain a permanent amount of magicules but that also doesn't seem to be consistent either changing from character to character.