Some sources say that Giles Brent was enlisted by the
Virginia Company of London in 1621 to chart the Chesapeake Bay. Most records begin Brent's residence in the New World in 1637/8. Aged about 27 years old, Brent sailed from England on the ship
Elizabeth to the
Province of Maryland. With Maryland being a quasi-refuge for Catholics, Giles's brother Fulk (or Fulke) Brent and his sisters
Margaret Brent and Mary Brent emigrated later in 1638. Giles held the office of
Treasurer of the colony in about 1640. He had property near
St. Mary's City, but then in February 1639, replaced a William Brainthwayte (Braithwaite) as commander of
Kent Fort on the
Isle of Kent, an island which was heavily contested at times by native
Susquehannock people and by previous landholder
William Claiborne. Giles Brent was a in the
Maryland General Assembly . Brent was deputized as
Governor and also named "Lieutenant General, Admiral, Chief Captain, Magistrate, and Commander [of Maryland]" by
Leonard Calvert whilst he traveled to England. In late 1644, Giles Brent was approximately 38 to 40 years old. He married
Mary Kittamaquund, a daughter to the
Piscataway leader, who was also a juvenile
ward of Governor Calvert. Mary Kittamaquund Brent's ability to speak the
Algonquin language helped maintain friendly relations between the Brents and
Patawomecks. Giles eventually was exonerated and returned to Maryland. Leonard Calvert died in 1647, leaving his estate matters to
Margaret Brent and appointing
Thomas Greene as governor of the colony. ==In Northern Virginia (1645 onward)==