John Gregory Berylson[1] (2 June 1953 – 4 July 2023) was an American businessman and founder of Chestnut Hill Ventures LLC.

[citation needed] Berylson was the director of Youngworld Stores Group, Inc and Non Executive Chairman, Member of Audit Committee and Member of Remuneration Committee of Millwall Holdings PLC.

He held numerous Trustee positions; at the Beth Israel Deaconess Medical Center, The Newton-Wellesley Hospital, Brown University Sports Foundation, and he held the position of Director at the Brown University Library System.

[7] They primarily supported education, as well as philanthropy in Boston through the Richard and Susan Smith Family Foundation.

[9] Berylson was driving in Falmouth, Massachusetts, lost control of his Range Rover and hit a tree.