Valentinian

Valentinian may refer to:
 * Valentinian I or Valentinian the Great (321–375), Western Roman emperor from 364 to 375
 * Valentinian II (371–392), Western Roman Emperor from 375 to 392
 * Valentinian III (419–455), Western Roman Emperor from 425 to 455
 * Valentinus (Gnostic), theologian and founder of Valentinianism
 * Valentinian (play), a Jacobean-era stage play
 * Valentinianic dynasty, an Imperial Roman dynasty founded by Valentinian I and sometimes known as the Valentinian dynasty