Saṃskṛta-nāṭaka - Śūdraka (Part 2) - The Playwright
Sten Knonow, however, opines that Śūdraka must have been another name for the king of ābhīras called Śiva-datta and this king is known to have lived in the third century CE. The primary evidence he draws to support his argument is the fact that in the play, we see a character named Āryaka, the son of Gopāla, eventually replacing King Pālaka on the throne. The ābhīras were cowherds (gopālas) and thus, the conclusion drawn by Sten Knonow. This does not sound reasonable.