Simplify the following text for a Grade 10 native English-speaking person.
Original: The two primary founders of the band , Malcolm Young and Angus Young , developed the idea for the band 's name after their sister Margaret saw the initials `` AC\/DC '' written on a sewing machine .
Simplified: Malcolm and Angus Young developed the idea for the band 's name after their older sister , Margaret Young , saw the initials `` AC\/DC '' on a sewing machine .