This Theudas is otherwise unknown, although the Jewish historian Josephus mentions a different man with the same name who led a revolution some years later (see Josephus, Antiquities 20.5.1). Theudas was a common Jewish name.
Judas of Galilee appears in Josephus as a rebel who opposed paying taxes to Caesar around AD 6 or 7, following the census of Quirinius (see Josephus, Antiquities 20.5.2; compare Luke 2:2). His resistance was stopped by the Roman authorities, who used force to end the revolt