Quadra'tus, Ummi'dius
3.
Ummidius Quadratus, is mentioned as one of the persons whom Hadrian persecuted. (Spartian.
Hadr. 15.)
He may have been a son of No. 2, who probably married again after the time that Pliny's letter was written.
It seems to have been this Quadratus who married the sister of Antoninus Pius.