The Russian polymath scholar, priest, and martyr Pavel Florensky offered a famous description of adelphopoiesis in his monumental 1914 book The Pillar and the Ground of The Truth: An Essay in Orthodox Theodicy in Twelve Letters, which included an early bibliography on the topic [REF].
Rites for "adelphopoiesis" are contained in Byzantine manuscripts dating from the ninth to the 15th century [REF].