Wikipedia: the source that anyone can write.
Articles on more niche subjects should be regarded with great cynicism, though. Those are often poorly sourced and nobody catches when they get altered by someone with bias.
Pretty sure that yellow box got me a few times as well.
probably there are more names that derive from the word for monk but i cant think of any from the top of my head. Monaco isnt one of them though, despite the coincidences :)