Though the 19-year-old midfielder was only a young boy at the time, he remembers his brother's death and has been dedicating goals to him for years.
"I like to dedicate my special stuff to him," Grealish told the Birmingham Mail. "When I scored in the Next Gen I dedicated my goals to him so hopefully I can do that again in the first team and make him proud.
"I was only young when he died and it was so sad. It taught me to enjoy my life, that's what you have got to do.
"It was a horrible time for my parents but this is where we are now and my aim is just to make them all proud."