4. M. Ummidius
Quadratus, the son of No. 3, was the nephew of Antoninus Pius, being his sister's son. Antoninus Pius gave his maternal property to this Quadratus. (Capitol. M. Aurel.
7, where he is in some editions erroneously called Mummius Quadratus.)
He was consul in A. D. 167, with M. Aurelius Verus.