Comment by rwmj

This happened to me once, so I guess not so unusual. Our project was called "bitmatch", because it enhanced the OCaml "match" operator to allow matching on bitfields. We didn't apply for a trademark, obviously, as the project was tiny and who does that.

Some US company sued because they held a US trademark for "bitmatch". Luckily they sued my employer (Red Hat) and Red Hat's lawyers dealt with it, but we did have to rename the project to "bitstring" (https://bitstring.software/).