Holy Martyr Agathonikos of Nicomedia and those with him.
St. Agathonikos was a Christian of noble birth in Nicomedia who lived in the time of the Emperor Maximian. Zealous for the faith, he brought many pagans to Christ, for which he was seized by the governor, tortured, and taken in chains along the road toward Byzantium together with other confessors.
The synaxaria relate that he and his companions were beheaded for Christ near Selymbria in Thrace. A church was later raised in his honor in Constantinople. He is commemorated on August 22.
Feast day
On the New Calendar, Agathonikos of Nicomedia is commemorated on August 22. Churches on the Old (Julian) Calendar keep the feast on September 4 of the civil calendar.
Who celebrates a name day
People with these names keep their name day on this feast:
Agathonikos, Agathonikis, Agathoniki
Also commemorated on August 22

Phokas of Sinope (Bishop)
Hierarch, Φωκάς Σινώπης
Holy Hieromartyr Phocas, Bishop of Sinope.
Name days: Fokas
Anthousa of Seleucia
Holy Woman, Ανθούσα
Venerable Anthousa of Seleucia, with the Hieromartyr Athanasios who baptized her and her servants Charisimos and Neophytos.