Everyone knows what a Pigtail, a Pompadour and a Mullet are -- but how many people can say that they know why they're named what they're named?

Brace yourself for you're about to be among those rare few. The folks at Today I Found Out have dug deep to get to figure out the genesis of some of the world's most famous and popular hairstyles. To wit ...

The Mullet: The term "mullethead" dates back to 1857 and means "dull/stupid person" -- no offense Billy Ray Cyrus. (Although, these days having had a mullet is probably the least of his concerns.)

READ: 14 Best Pixie Cuts and Bobs for Your Face Shape

The Mohawk: It stands to reason that this shaved style with the middle strip of hair left in place stems from the Native American Mohawk tribe. What we didn't know is that back then, "they did not shave their heads, instead pulled hair from their heads, small tufts at a time." (!) I defy even the most ardent punk rocker to earn his Hawk the old fashioned way.

The Pigtail: Now, this is interesting; " the term pigtail was used back in the 1600s to describe a twist of chewing tobacco. To prepare the tobacco, several leaves were twisted together into a tight bunch that was then cured. Many people referred to this bunch as a pigtail because it resembled the curly tail of a pig. By the late 1600s, the pigtail reference for hair was born as a way to describe a section(s) of hair gathered and fastened on the head."

The Pompadour: The eponymous style of Madame de Pompadour, one of King Louis XV's many mistresses, has been an on-again/off-again fad since she debuted it way back in 1721. Elvis, Pink and Justin Bieber are but a few of the celebrities who owe it to la grande madame for having paved the way for their boffo bouffante style.

See? So, now you know. For more "how'd they get that name" fun, click here and, to find out which are the 10 Most Requested Hairstyles of All Time, click through.