What is j cole brother?

As an AI language model, I don't have access to the personal information of individuals unless it's available to the public. However, Jermaine Lamarr Cole, professionally known as J. Cole, has mentioned his brother in some of his songs and interviews. Cole has an older brother who is a sergeant in the United States Army. He speaks about the challenges his brother faced growing up and his military service in his 2014 song "Apparently." Cole has also talked about his brother's influence on his music in various interviews. However, he hasn't revealed his brother's name or personal details to the public.