I kinda made up an old wives tale, so maybe it could be classified as a young (then) fathers tale.
We were on a family vacation. Eldest son was getting into puberty, and he was a handful, and part of it was an explosive temper.
We were at a tourist shop with polished rocks for sale, and one of them was hematite, You'd think that "hematite" would be red, but it's more of a gunmetal color. Anyway, he asked me where the name came from, and I made up a story on the spot.
I said "hema" was the root word for "blood," and that much was true, but the rest was all prairie patty. I continued, saying that back in the old days, this special rock was thought to remove bad tempers, or evil blood, from the person rubbing it, so it got the name hematite, meaning blood rock. Here, son, let me buy it for you and see if it works.
Doggone if he didn't carry that thing around and start rubbing it when he started to get angry or upset, and it would actually help. When he started getting upset, the other kids would say, "Where's your blood rock," and he'd pull it out, rub at it, and start calming down.
From such parental desperation noises are stories begun.