Microsoft employee Saeed Noursalehi announced the decision to rename Microsoft's Git Virtual File System (GVFS) due to a conflict with the GNOME Virtual File System (Gvfs) project:
We’ve heard the feedback, so lets use this issue to come up with a new name for this project. As we all know, folks from Microsoft don’t have a rich tradition of picking super awesome names for things. I'm no exception to that pattern, so I was thinking we could all put some sensible suggestions into this issue. I’ll then compile a short list and then we’ll all get to vote on the new name.
Source: https://github.com/Microsoft/GVFS/issues/72
(Score: 0) by Anonymous Coward on Thursday June 07 2018, @10:37PM
The gospel according to Wikipedia... [wikipedia.org]
So it's not that SEQUEL was the predecessor to SQL. They just renamed it for legal reasons, and it seems very likely that the new name was selected in part because it could reasonably be pronounced the same way.
I'm sure SQL today bears little resemblance to the SQL of 1973, but the same will be true for virtually any language with more than 40 years of history.