Adelphopoiesis, or adelphopoiia from the Greek ἀδελφοποίησις, derived from ἀδελφός (adelphos) “brother” and ποιέω (poieō) “I make”, literally “brother-making” is a ceremony practiced historically in some Christian traditions to unite together two people of the same sex (normally men) in church-recognized friendship.
The christian martyrs Saint Sergius and Saint Bacchus, noted for their friendship in Christ, were cited in church adelphopoiesis records.