Kylie & Kendall Jenner trademark their first names...

This is so hilarious. According to a report byTMZ, Kylie, 17 & Kendall, 19, have trademarked their names to prevent others in the US entertainment industry from using it. No sense! The report below..

Warning to Kylie Minogue or anyone else named Kylie, you may no longer be allowed to use your first name because a 17 year old thinks it should be hers and hers alone.

It's all part of the Kardashian's blitzkrieg campaign. We've learned Kylie Jenner has filed an application last month to trademark her first name to "entertainment in the nature of providing information by means of a global computer network in the fields of entertainment, fashion and pop culture."

Kylie also wants to mark her territory for personal appearances "by a celebrity, actress and model."

Although someone might theoretically use the name "Kylie" with a different font, K.J.'s lawyers could swoop in and argue it creates confusion among consumers.  So Kylie Minogue, move over.

BTW ... Kendall has filed an application to trademark her first name for the same purposes.

So watch your ass, Ken Doll.