Adverb
epigraphically (not comparable)
In terms of epigraphs.
an ancient name that is attested epigraphically
Livy I 12; Dionysius of Halicarnassus II 59; Ovid Fasti VI 793; Cicero Catilinaria I 33. There may have been an earlier shrine ( fanum ), since the Jupiter's cult is attested epigraphically. Source: Internet
Tibur too had his own vestals who are attested epigraphically. Source: Internet