<P> Sheldon contrasts strongly with his family , who are neither scientists nor intellectuals . His father George died before the start of The Big Bang Theory , when Sheldon was 14 , while his mother Mary is a devout born - again Christian and loving parent . Sheldon has two siblings : a twin sister , Missy , who is a tall , attractive brunette as an adult ; and an older brother , George Jr. , seen thus far only on Young Sheldon . Both Missy and George Jr. beat up Sheldon during their childhoods , and their mother describes them to be `` dumb as soup '' . Sheldon is very fond of his maternal grandmother , whom he calls `` Meemaw '' and who calls him `` Moon Pie '' . He called his grandfather , who died when Sheldon was five , Pop Pop . Sheldon was also very close to his grandfather , stating once that his grandfather is the only relative he had who encouraged him to become involved in science . </P>
<P> Sheldon contrasts strongly with his family , who are neither scientists nor intellectuals . His father George died before the start of The Big Bang Theory , when Sheldon was 14 , while his mother Mary is a devout born - again Christian and loving parent . Sheldon has two siblings : a twin sister , Missy , who is a tall , attractive brunette as an adult ; and an older brother , George Jr. , seen thus far only on Young Sheldon . Both Missy and George Jr. beat up Sheldon during their childhoods , and their mother describes them to be `` dumb as soup '' . Sheldon is very fond of his maternal grandmother , whom he calls `` Meemaw '' and who calls him `` Moon Pie '' . He called his grandfather , who died when Sheldon was five , Pop Pop . Sheldon was also very close to his grandfather , stating once that his grandfather is the only relative he had who encouraged him to become involved in science . </P>
how old was sheldon when his father died
how old was sheldon when his father died
14
14