Yes, you cannot use King because King is on the reserved list as it is considered a title.
The other names that you provided absolutely would be considered inappropriate, and I would recommend that you delete them. If you are logging into them and they are reported, penalties may be applied as a result.
We do have restrictions on the use of certain words and phrases during name creation, but it is fairly impossible to cover every eventuality without impacting the normal use of language, as some names can contain some similar combinations of letters that would otherwise be fine.
We’ve also found that folks can be… creative… in their naming conventions, so a broad spectrum of restrictions isn’t as effective as we may like. Responding to player reports allows us to catch names that fall into that category. That is, when the reporting tools are used to bring those names to our attention.
Please be sure to report any names you see that you feel may violate our policies.