Kiel has an extensive and impressive family lineage. His son Brandon was a successful quarterback for Hamilton Southeastern High School in Fishers, Indiana, earning a scholarship to Indiana University before leaving the football team. Blair has two brothers, Pat and Kevin, who also played football for Columbus East at the same time. Kip went on to Butler University to play football after sustaining an injury. His sons, Blair's nephews, have gone on to have successful quarterbacking careers as well. Drew Kiel is currently quarterback for Illinois State while Dusty Kiel earned a scholarship to Indiana University and the youngest, Gunner, is the top rated quarterback according to ESPN Scouts Inc. and has committed to University of Notre Dame.