Snoopy is famously Charlie Brown’s dog in Peanuts continuity, and for the entirety of their relationship, Charlie Brown was under the impression that he and Snoopy were best friends. However, after re-reading some Peanuts comic strips, I’ve had a startling realization: Snoopy doesn’t even know Charlie Brown’s name. Snoopy knows Charlie Brown is responsible for feeding and taking care of him, but that seems to be about as far as their relationship goes (from Snoopy’s perspective) – and honestly, this is the most ‘Charlie Brown’ thing to ever happen to Charlie Brown in Peanuts.

https://screenrant.com/peanuts-best-running-gag-charlie-brown-name-snoopy-op-ed/