Zoilus I Dicaeus (Ancient Greek: Ζωΐλος Δίκαιος, romanized: Zōïlos Díkaios; epithet means "the Just") was an Indo-Greek king who ruled in Afghanistan and Pakistan, and occupied the areas of the Paropamisade and Arachosia previously held by Menander I. He may have belonged to the dynasty of Euthydemus I.
Theophilus Dicaeus (Ancient Greek: Θεόφιλος Δίκαιος, romanized: Theophilos Dikaios) was a minor Indo-Greek king who ruled for a short time in the Paropamisadae. He was possibly a relative of Zoilus I and is only known from coins. It is possible that some of Theophilus' coins in fact belong to another ruler, in Greek Bactria, during approximately the same period.