Greg is survived by his older brother, Christopher Noble Allen; aunts and uncles Bruce Allen, Tamzen Allen Talman and Chun Cha Allen, and a number of close cousins. Greg also leaves behind many lifelong, cherished friends. He was preceded in death by his parents, Frank Nobel Allen and Leila Phillips Allen Ivins; grandparents Kenneth and Sylvia Phillips, Dorothy Keene Allen and Jack Garner Allen; aunts and uncles Kim James Allen, Bob and Diane Firchau, Kenneth Jr. and Dorothy Phillips, and Kay Phillips Braulik with whom he was very close.
A Celebration of Life will be held at the Lake Ellyn Boathouse from 4:30-7:30pm on Dec. 29, 2025. The service will begin promptly at 4:45pm, with a light, casual dinner and fellowship to follow. There will be a private family burial at a date to be determined.