E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
The superior of a preceptory was called by the Templars a Knight Preceptor; a Grand Preceptor was the head of all the preceptories, or houses of the Knights Templars, in an entire province, the three of highest rank being the Grand Preceptors of Jerusalem, Tripolis, and Antioch. Houses of these knights which were not preceptories were called commanderies.