Me too, but given certain educational methods of the past, I can also imagine it happening. Here's an example of teaching Latin in the 19th century. Read the first 1/3 from the link from today's front page: https://news.ycombinator.com/item?id=36354213. Latin was taught by rote, by repeating without understanding. One of those head masters must once have thought it would be correct to call it "and per se and," and had the power to make generations do it.

On the other hand, why it would have become so widespread as to become a word is what makes me doubt the story.