I think it’s more probable that it comes from mahonnaise, after the town of Mahon in the Balearic island of Menorca, conquered by the French in 1756, where they learned about it.
The first mention of it is in a Menorcan cookbook from 1750, where it still uses garlic. When the French conquered the island they took the recipe and leave out the garlic to please their taste. They also called it mahonnaise for the harbour town of Mahon. And it’s said that the name got changed into mayonnaise when they made a typo and turned the h upside down on the printing press.
Well, in Spain we have a saying for the people who put their name in the first place: “El burro delante, para que no se espante” (The donkey in front, so it doesn’t get scared).
The problem here is that USians act as if the USA were the whole America. Technically, a Native American would be any indigenous person from Tierra del Fuego to Murchinson Promontory.
So Dr. Pepper is made with actual peppers?