alt Hacker NewsRust was created on a Mozilla payroll to provide a C++ alternative with better concurrency support for the purpose of browser engine rewrite. Also, Rust doesn't have a 'creator', the person tasked with leading the project didn't have the authority to make the decisions, see https://graydon2.dreamwidth.org/307291.html
Rust was a personal project of Graydon's for years before it was sponsored by Mozilla. It's perfectly apt to be included in the parent poster's list.