What is "lartia"

The gens Lartia, sometimes spelled Larcia or Largia, was a patrician family at Rome, distinguished at the beginning of the Republic through two of its members, Titus Lartius, the first dictator, and Spurius Lartius, the companion of Horatius on the wooden bridge. The name soon after disappears entirely from the annals. A family by this name existed in the early Empire, but its relationship to the Lartii of the early Republic is unknown.