Libo Rupilius Frugi (died 101) was a Roman senator and an ancestor of the emperor Marcus Aurelius.
His brother Gaius Calpurnius Piso Crassus Frugi Licinianus[2] had been a consul in 87.
[2][3] The father of Frugi was executed by the emperor Nero between 66 and 68, because of information brought against him by Marcus Aquilius Regulus.
[3] He has been identified with the ex-consul "Libo Frugi" whom Pliny the Younger reports as speaking aggressively in the Senate concerning the case of Norbanus Licinianus.
[8] Historians Christian Settipani and Strachan have proposed that Faustina's mother was instead Vitellia Galeria Fundania, daughter of emperor Vitellius.