If they had killed by father and my mother and all my friends, yet if they had come to treat of peace, they ought to have gone in peace.

William Berkeley may refer to:
William de Berkeley 1st Marquess of Berkeley (1426–1492) English nobleman
William Berkeley (MP died 1552) MP for Hereford (UK Parliament constituency)
William Berkeley (governor) (1605–1677) colonial governor of Virginia
William Berkeley (Royal Navy officer) (1639-1666) English naval officer
William Berkeley 4th Baron Berkeley of Stratton (d.