 John de Havilland used a coat of arms recorded at the 1623 visitation of Gloucester.The arms are blazoned "Argent three Towers triple-towered Sable Portcullises Gules".As York Herald, de Havilland impaled these with his maternal arms of von Sonntag, blazoned "Azure a Sun in splendor proper" in the window of St Peter's Church, illustrated below, and used a Chief of Religion as a Knight of Malta in addition to setting his shield on the Maltese Cross.