D'Aguilar history

In 1827, Sir Thomas Mitchell, the Surveyor-General for the Colony of New South Wales, named the D'Aguilar Range after Sir George D'Aguilar, a military officer who wrote the army textbook in use at the time, Regulations and Punishments of the British Army . He was probably known personally to the Governor, Lieutenant General Ralph Darling; the Moreton Bay Commandant, Captain Patrick Logan; as well as to Major Mitchell, for they all served in the Peninsula Wars under the Duke of Wellington. It is not clear which of these three originally suggested the name.