Diego's younger brother, Antonio de Covarrubias (1514/24-1602), would be a professor of law at the University of Salamanca and served as consejero of Castile.

[3] Later on he was entrusted with the work of reforming that institution, already venerable for its age, and the legislation which he drew up looking to this end remained in effect long after his time.

If report be true, the large library of Oviedo, where at the age of twenty-six he became professor, did not contain a single volume which he had not annotated.

While president of the Council of State he was nominated by Philip II for the Bishopric of Cuenca, but death prevented him from assuming his duties.

[13] The principal work of Covarruvias is his Variarum resolutionum ex jure pontificio regio et cæsareo libri IV.

Quite distinct in character from his other productions is his numismatic treatise, Veterum numismatum collatio cum his quæ modo expenduntur, etc.