Background
Trenchard was born in Charminster, near Dorchester, the son of Sir George Trenchard of Warmwell and his wife Ann née Speke, daughter of Sir George Speke of White Lackington.
Trenchard was born in Charminster, near Dorchester, the son of Sir George Trenchard of Warmwell and his wife Ann née Speke, daughter of Sir George Speke of White Lackington.
He was re-elected Member of Parliament for Wareham in 1624 and 1625. In April 1640, Trenchard was re-elected Member of Parliament for Wareham in the Short Parliament. He was elected again Member of Parliament for Wareham for the Long Parliament in November 1640, and sat until 1653.
He was elected Member of Parliament for Dorset in the First Protectorate Parliament of 1653 and the Second Protectorate Parliament in 1656.
He sat again for Wareham in 1659 in the Restored Rump Parliament. Trenchard died at Warmwell, near Dorchester.
Trenchard married Jane Rodney, daughter of Sir John Rodney of Stoke, Somerset.
Short Parliament; Useless Parliament. Happy Parliament]
In 1621, Trenchard was elected Member of Parliament for Wareham.