What about Archie Bell?
For several years, I was under the impression that Chris Bell, of Big Star and "I Am The Cosmos" fame, was the son of the man who created Taco Bell. I even used to enjoy sharing this bit of false trivia with people, helping to spread my own inadvertently created rock'n'roll "urban legend".
I only recently learned the truth and realized the cause of my confusion. Somewhere along the line, I had taken two pieces of accurate but incomplete information - Bell's father owned a restaurant and Taco Bell was founded by a Mr. Bell - and put them together. In fact, Chris Bell's father was a restaurateur, but his place was called the Knickerbocker. And the founder of Taco Bell was named Bell, but he was from Southern California, not Memphis, and was apparently no relation.
—The Selected Ballads, "Disambiguation of a Bell"