NT was a fully seperate product from 95 and 98, using a different kernel. 95 -> 98 -> Me was the old kernel, NT -> 2000 -> XP -> Vista -> 7 -> 8 -> 10 -> 11 is the other line. Me was a play on Millenium Edition, so that line was just numbered by year. The NT series names are a bit wonky, though. The reason for skipping 9 involves legacy program support and bad coding practices from ye olde programmers. 7 was kind of an arbitrary number to begin with, though.
Reminds me of Morrowind’s directions, with the frequent east-west mixups, and sporadic north-south mixups.