Think of it like language, was there ever Latin speaking parents that gave birth to a French speaking child? No, it’s a gradual change. Or take a color gradient from blue to red there’s a definite change taking place but picking out one specific spot in the middle might be purple

Lead being an element means you would either need to make it radioactively decay somehow(which I’m not sure any form of lead is want to do) or perform some kind of alchemy.

I would like to point you to Platinum, and inform you that Aluminum came first.