Indeed! In Polycarp’s Letter to the Philipians, Polycarp either quotes from or alludes to all 27 books, including The Revelation of John. Polycarp was martyred in 156 AD.
Ah, yes... but Polycarp also cites several books which did NOT become part of the canon.
(The Protestant canon excludes Tobit, from which Polycarp cites, “alms delivers from death.”)