In the early 40's, there was a small, family acrobatic group that performed with Haley's travelling circus as trapeze artists. They were know as The Flying Graysons. They included John and Mary Grayson, and their son, Dick Grayson. During a tragic show accident one night, John and Mary lost their lives, leaving Dick to be adopted. Dick was adopted into a family and ended up with 3 brothers, Jason, Tim, and Damian.
When Dick grew up and married Barbara Gordon, he named his first born son after his late brother, Damian. Thus, we have Damian Grayson. Damian, continuing on the family tradition of adopting, adopted Andrew Longbottom and later Draco Hunter, now Drew and Draco Grayson respectively. He also married Pinkie Lawson. Draco has since married Esther and together they will soon become McGonnagals Heights or Sinestras. Drew Grayson remains the only sexy bachelor left.
Here's a link to the family tree: http://www.familyecho.com/?p=START&c=15lrr6ebb4v&f=790130510621532237
Family Motto: Holy Family Motto!