Roger Ludlow (1590–1664) was an English lawyer, magistrate, military officer, and colonist. He was active in the founding of the Colony of Connecticut, and helped draft laws for it and the nearby Massachusetts Bay Colony. Under his and John Mason's direction, Boston's first fortification, later known as Castle William and then Fort Independence was built on Castle Island in Boston harbor. Frequently at odds with his peers, he eventually also founded Fairfield and Norwalk before leaving New England entirely.

John Mason was an English-born settler, soldier, commander and Deputy Governor of the Connecticut Colony. Mason was best known for leading a group of Puritan settlers and Indian allies on a combined attack on a Pequot Fort in an event known as the Mystic Massacre. The destruction and loss of life he oversaw effectively ended the hegemony of the Pequot tribe in southeast Connecticut.