Thanks to Eusebius, 4th century Christian historian, we know of:
Aristo of Pella – “As Aristo relates…”
– Dialogue Between Jason & Papiscus
– https://godawa.com/wp/wp-content/uploads/2019/04/Koester-The-Origin-and-Significance-of-the-Flight-to-Pella-Tradition.pdf
– https://jamestabor.com/wp-content/uploads/2016/02/Pella-Flight-Houwelingen.pdf
Hegesippus – defended the faith, chronology of leadership
– Memoirs (‘lineage of Popes’)
– Fought against Gnostic ideas in the Church and those who disregarded Jewish theology entirely.
– https://www.youtube.com/watch?v=tcPOK5SEB9Q&t=425s
Muratorian Fragment
– https://www.neverthirsty.org/bible-qa/qa-archives/question/what-is-the-muratorian-fragment/
We mentioned reading about the Gospel to the Hebrews and the Shepherd of Hermas which both were writings considered part of Christian reading and discussion.