Saint Limnus was martyred during the persecution in the reign of Decius (249-251), along with Saints Pionius and Macedonia, Sabina, and Asclepiades. They suffered at Smyrna, a mercantile city on the eastern shores of the Aegean Sea.
Saint Limnus was a priest of the Church of Smyrna, and his wife Saint Macedonia was from the village of Karine. They had been cast into prison for confessing Christ. That is where Saint Pionius and his companions met them.
The Life of Saint Pionius does not record the details of the martyrdom of Saints Limnus or Macedonia.