Classmates are shown both under current married name and high school last/maiden name unless both would be on the same page.
An asterisk "*" in the "Maybe" column means they have said they "may" come.
If you see a good friend here, work on them.

If no spouse/partner is shown it means either there isn't one or they are not planning to attend. If the Spouse or partner appears in the "Maybe" column when the classmate is shown attending, it means the spouse may attend.

If the classmate name is missing, they have indicated they will not attend. Or have not indicated.