We may have discovered the earliest instance of a family naming a child after a commercial brand. The Scotsman reports that in the year 1379 -- 1379! -- a couple named its daughter Diot Coke. Now, Coke was yet to be a brand -- it was most likely a variation of the name Cook. And Diot was diminutive for Dionisia, now more commonly used as Denise, but fancy that.
Diot Coke. In 1379. A name before its time.