Currently, existing meetups will continue to be called HWC as to not confuse previous attendees. New meetups have the option to call themselves IndieWeb meetup or HWC. Either way it gets included in the events calendar (https://indieweb.org/events/2018-10-10-homebrew-website-club#Vancouver
) Notice the only reason Vancouver is linked to another page here is because it's meeting on a Tuesday rather than Wednesday which is the usual. Both IndieWeb meetups and HWC will be included in the weekly newsletter, and the routine podcasts (This Week in the IndieWeb Audio Edition and My Url Is). I don't foresee any visitors being confused by it being called an IndieWeb meetup, in fact, I think you might have more visitors because people who are familiar with IndieWeb but NOT the HWC name will still be interested in attending.