does he have siblings?
Yes, Bill Monroe, Bertha, Birch
Biography
 Bill Monroe. His sister Bertha also played guitar, and brother Birch, fiddle. 
who is the original singer of you're gonna miss me when i'm gone Over the years, the original has been recorded by many artists, most notably by Charlie Monroe. Lulu and the Lampshades were the first to use the cup game for percussion when performing the song who is this mentioned person? He  was an American country and bluegrass music guitarist.
Yes, Bill, Bertha and Birch. Yes, Bill Monroe. Yes, two brothers and a sister.
Charlie Monroe Charlie Monroe Charlie Monroe
Biography Biography Biography
Charlie Monroe was born on his family's farm in Rosine, Kentucky; he was the older brother of the mandolin player Bill Monroe. His sister Bertha also played guitar, and brother Birch, fiddle. Charlie, Birch, and Bill played together as a band in the middle of the 1920s, and played on radio starting in 1927. Charlie Monroe was born on his family's farm in Rosine, Kentucky; he was the older brother of the mandolin player Bill Monroe. Charlie Monroe was born on his family's farm in Rosine, Kentucky; he was the older brother of the mandolin player Bill Monroe. His sister Bertha also played guitar, and brother Birch, fiddle. 
wiki:23007210
Charlie Monroe [SEP] Biography
Charlie Monroe was born on his family's farm in Rosine, Kentucky; he was the older brother of the mandolin player Bill Monroe. His sister Bertha also played guitar, and brother Birch, fiddle. Charlie, Birch, and Bill played together as a band in the middle of the 1920s, and played on radio starting in 1927. Soon after this, however, their parents died and Charlie and Birch moved to Detroit and then Indiana to find work, eventually taking jobs in oil refineries near Hammond, Indiana. Bill followed them into the oil business in 1929, and the three continued performing in small-time and private venues.