Lewis & Short

2. Largus, i, m.,

  1. I. a Roman surname, esp. in the gens Scribonia, Cic. Fam. 6, 8, 1; id. de Or. 2, 59, 240: P. Largus Caecina, Tac. A. 11, 33.
    Hence,
  2. II. Largĭānus, a, um, adj., of or belonging to a Largus, Largian: senatusconsultum, Just. Inst. 3, 7 fin.