Numerous early church fathers referenced or commented on Acts 20:28. Here are some examples:
Tertullian: Tertullian, a prolific Christian author from the 2nd and 3rd centuries, made frequent reference to this verse, which he used to support his views, especially regarding marriage and its connection to the "blood of God".
Hippolytus: A 3rd-century theologian, Hippolytus, in his work "The Refutation of All Heresies," referenced Acts 20:28 in the context of addressing the emergence of heresies and the importance of preserving the unity and doctrines of the Church.
Peter of Alexandria: Another 3rd-century figure, Peter of Alexandria, referenced Acts 20:28 in his "Genuine Acts of Peter".
John Chrysostom: The renowned 4th-century preacher and Patriarch of Constantinople, John Chrysostom, commented on Acts 20:28 in his Homilies on the Acts of the Apostles. He emphasized the importance of the elders' role as overseers, their ordination by the Holy Spirit, and the preciousness of the Church, which was purchased with Christ's blood.
Apostolic Constitutions: This collection of liturgical and disciplinary regulations, though compiled later (around the 4th century), also includes references to Acts 20:28 within its prayers and exhortations concerning the role of bishops and the Church as purchased by Christ's blood.
Other Fathers: Various other early church fathers like Irenaeus, Cyprian, Origen, Ambrose, Jerome, and others also referenced Acts 20:28.
None of the quotes and paraphrases include the word "son".
@SBF Why didn't the early Christian leaders quote and paraphrase this verse like you and Watchtower does?