X. Loriot describes Ragonius Venustus as an example of the "new generation of clarissimi" that emerged under the reign of Alexander Severus.
As the son and grandson of consuls, he attained the consulate without necessarily having served as military tribune, legate of a legion, or provincial governor, unlike his colleague Gaius Octavius Appius Suetrius Sabinus.
Ragonius Venustus' first ancestor to gain fame was L. Ragonius L. f. Urinatius Larcius Quintianus, who was appointed suffect consul under Commodus not long after AD 180.
Tuscenius Quintianus and his wife, Flavia T. f. Venusta, were the parents of Ragonius Venustus.
Another likely descendant is Lucius Ragonius Venustus who performed a taurobolium in 390.