Simplify the following text for a Grade 6 native English-speaking person.
Original: Lewis Brian Hopkins Jones ( 28 February 1942 â `` 3 July 1969 ) , known as Brian Jones , was an English musician and a founding member of The Rolling Stones .
Simplified: Lewis Brian Hopkin Jones ( 28 February 1942 â `` 3 July 1969 ) was an English musician . He is best known as one of the founding members of the rock band The Rolling Stones .