Athanasius of Brest (Russian: Афанасий Брестский, Belarusian: Афанасій Брэсцкі) (died September 5, 1648) is a saint and hieromartyr of the Russian Orthodox Church and the Polish Orthodox Church.

Athanasius Filipovich was born to a petty Lithuanian nobleman, in 1597, according to Orthodox Christian tradition,[1] in Brest, then part of the Polish–Lithuanian Commonwealth.

[3] In 1640, Athanasius became hegumen of the Monastery of St Simeon Stylites in Brest.

[3] Athanasius was then sent to Peter Mogila, Metropolitan of Kiev, who sent him back to Brest.

Similar to Josaphat Kuntsevych, Athanasius of Brest is not venerated in the denomination of his persecutors.