Kylie,17, and Kendall, 19, Jenner are trying to trademark their names.
The sisters both filed applications to copyright their monikers last month in a bid to assert themselves as international stars.
Kylie is eager to secure control of her name as she continued to pursue a burgeoning role as a reality TV star, thanks to her part on 'Keeping Up With The Kardashians'.
According to gossip website TMZ, Kylie is trademarking her name for 'entertainment in the nature of providing information by means of a global computer network in the fields of entertainment, fashion and pop culture.'
The website also reports the teenager is claiming the name for personal appearances 'by a celebrity, actress and model,' and could prosecute other stars using her first name if it becomes a source of confusion.
The news might come as a shock to Australian pop princess Kylie Minogue, who was using the name for 28 years before Jenner was born. The 46-year-old does have an existing trademark on her moniker - but its for her full name.
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