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

• The Order of the Crown of Charlemagne

• The Society of the Cincinnati

• National Society 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)

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

• Order of the Norman Conquest

• The Merovingian Dynasty

• The Baronial Order of Magna Charta

• Order of the Descendants of the Justiciars

• Descendants of Lady Godiva

• National Guild of Saint Margaret of Scotland

• National Society of Saints and Sinners

• The Order of Alba

• Order of the Kings of Wessex

• Order of the Monarchs of Rheims

• National Society Descendants of Colonial Indentured Servants

David belonged to over 40 lineage societies.