What is "tabalus"

Tabalus the Persian was the first satrap of Sardis. Cyrus the Great of Persia put him in place after conquering Lydia, c.546 BC. Herodotus mentions him in his histories (Hdt 1. 153-4).

This was the same Tabalus whom Pactyes the Lydian trapped in the acropolis when he revolted and marched upon Sardis later that year.