You know what I found out about Canola oil? It's not made out of canolas. It's really rapeseed oil, a cultivar developed in Canada that is low in erucic acid. But consumers were a little icked out at buying something called "rapeseed oil", so in 1978, they came up with a made up name, Canola, from Canadian oil low acid.
You can rest assured, though, that olive oil still comes form olives, corn oil still comes from corn, mineral oil still comes from minerals, and baby oil still comes from babies. (after they squeeze out all the oil from the babies, they grind the dried out husks into baby powder)