I'm not looking forward to people mistyping libcrurl as libcurl and people having to second guess what the intention was.
curl might not be a trademark but EU has 'moral right of the author' rules. In my mind libcrurl is right up there with a search engine named G00gle or a software company named MikeRowSoft.
"Crurl" is in "rural juror" territory.
Simple names in the era of the web are not always a good idea. Also see https://www.r-project.org/
See also - Rust