David Lawrence Grinnell was born in Newport, Rhode Island, to Clairmont Livesey Grinnell, Jr., and the former Mildred Anna Gladding. He had two children, son, Nathan Grinnell of Georgia and daughter, Jodi Grinnell Brierly of Missouri.

David graduated with a Bachelor of Science degree in Business Administration from Bryant College in Smithfield, RI. After working in public accounting for several years, he decided to try a religious vocation, attending Holy Cross Monastery in West Park, New York for three years. After leaving the Monastery, David returned to Rhode Island to pursue his career in accounting, working first for the City of Newport and later became the CFO of Codac. After he retired, he moved to Palm Springs CA.

Memberships

• Order of the Crown of Charlemagne in the United States of America

• Society of the Cincinnati

• National Society of the Sons of the American Revolution (Treasurer)

• Order of the Kings and Queens in the Holy Lands

• General Society of Mayflower Descendants (California Past State Treasurer)

• Order of the Norman Conquest

• Order of the Merovingian Dynasty

• Baronial Order of Magna Charta

• Order of Descendants of the Justiciars

• Society of Descendants of Lady Godiva

• National Guild of Saint Margaret of Scotland

• National Society of Saints and Sinners

• Order of Alba

• Order of the House of Wessex

• Order of Monarchs of Rheims

• National Society Descendants of Colonial Indentured Servants

David belonged to over 40 lineage societies.