Various people have been known by the name Theophilus. These include;

• Theophilus of Antioch — c 163, and early Christian patriarch.
• Theophilus of Alexandria — (? – 412) patriarch of Alexandria
• Theophilus (emperor) — (829 – 842) a Byzantine emperor of the second of the Phrygian dynasty.
• Theophilus Presbyter — (1070 – 1125) a Benedictine monk, metallurgist, and armourer. Thought to be a pseudonym of Roger of Helmarshausen

There is also a Theophilus crater on the Moon.