I would say Yes and No. I think Effective C++ was one of the first books to use this name, but now there is a publisher who uses "Effective xxxxx" in a series: https://www.amazon.com/dp/B08R2PKL9M?binding=paperback&searc... but that publisher does not seem related to the original Effective C++ author...

Anyway the introduction to Effective Rust explains the choice of name in a way: https://effective-rust.com/intro.html

> Is “Effective ___” a managed brand in any way or are people just riding coattails whether their product is good or not?

The word Effective is trademarked in the context of computer reference books: https://tsdr.uspto.gov/#caseNumber=75936440