 The first known member of the gens was his homonymous father, who passed a sumptuary law (the "lex Didia") when he was tribune of the plebs in 143 BC.From his filiation given in the Fasti Capitolini, we also know that Didius' grandfather was named Sextus.Titus Didius first appears in history as triumvir monetalis, one of the three men tasked with minting coins, probably in 113 or 112.