From the blog "Featured News"

We have been very pleased to see the response to the return of last names back in April of 2020. Much as we did with the original legacy surnames, we plan to continually update and change the last names that are available for selection. Now that Uplift is complete, we anticipate that the rotation of available options will happen more often. Today some of the older last name options were removed and the following new ones were added: Orlando Incognito Nebula Knickers Aviator Bunn