Thomas II was elected Patriarch of Constantinople six months and sixteen days after the death of his predecessor, Patriarch Peter. He ruled for three years (according to Theophanes), or two years and seven months (according to Nicephoros), or four years and seven months (according to the Leoglavious list).
He was ordained on the Holy Saturday of 665 AD, and fell asleep in 668 AD. Previously, he was Deacon and Chartophylax.Nicephoros Kallistos writes that Thomas II came from the Diaconate and was a scribe, a refendarius, and a chancellor of the Patriarchate, and director of the Scala Gerokomeion and of the Neapolis Ptochotropheion.
We not little more about Thomas II, other than he was pious, as was his successor. The Orthodox Church celebrates his memory on the 16th of November.