Throughout the Videssos Series, various saints from the religion of Phos are referenced in passing. The saints are not referred to as such, but are all called "the holy [name here]". Holy is a literal translation of the Latin title Sanctus, rendered in English as Saint, so that designation is given to this article for convenience. Very rarely is enough information given about a particular saint to make an in-universe biography possible.
The holy Nestorios lived on the island of Kalavria before it was conquered by Halogai pirates and became Namdalen. He is revered by the Namdaleni. A shrine is dedicated to him in Videssos the city, not far from the harbor of Kontoskalion.
Pakhomios was the author of Pakhomios' Rule, which was a important text.
A monastery devoted to Skirios in Videssos the city is often a setting or otherwise serves as an important plot point in several novels.
The monastery at Develtos was dedicated to Tralitzes.