Is Paris Hilton Perez Hilton's sister?
No, Perez Hilton was born Mario Armando Lavandeira, Jr, but his name is a play on Paris Hilton's name. You can read more about him here - http://en.wikipedia.org/wiki/Perez_Hilton
Paris Hilton is not Perez Hilton's sister. Paris Hilton has three younger siblings namely Conrad Hughes Hilton, Nicky Hilton and Barron Hilton. Perez Hilton and Paris Hilton are not related whatsoever.
No - but their both are sisters .