An Austrian dude named the Mercedes line of cars after his daughter Mercédès Adrienne Ramona Manuela Jellinek. He got the name from Spanish, and in Spanish all the "e"s are pronounced the same
True, but the full saying is, “I before E, except after C or when sounded as A as in neighbour and weigh. And weird is just weird.” There are still some exceptions to this rule though but most of the time, it’ll work.
There’s also a version that was taught to some people that goes like, “I before E, except after C, for words sounding like E” which worked most of the time too back when that saying was made (since we use more words of Greek origin now that break this rule).
Actually, that "full version" is still more wrong than it is right. For example: fancier, species, their, heist, foreign, vein, seize, science, Raleigh, Keith, Neil, either and neither, leisure, deity, atheism (ironic), reignite, albeit.
Currently going through this with my six year old. It's really hard to help her learn to read without just doing it for her over and over because pronunciation is shit. She can't just sound it out when the same letter sounds three different ways.