Jacob Alan Fabray is a major character in Glee. He is the younger brother of Quinn Fabray and is the only son of Russel and Judy Fabray. Jacob lived most of his life in his older sister Quinn's shadow.
Jacob is a quiet individual who's had suicidal thoughts his entire childhood and had nearly killed him by hanging until Quinn found him and saved him. He was later diagnosed with HCM after suddenly suffering a heart attack.