Lazarus does not need renaming.
Even if it did, to try to rename it because it might inflate some here-today, gone-tomorrow third party statistic would be about the most ridiculous motive for giving it a new name I can imagine.
Pascal, FPC and Lazarus are not super-popular compared with many other programming languages and IDEs. This is true, and no one can disagree. It may always be true (though we don't know the future until it arrives, so it might not always be true, though personally I doubt it will ever be super-popular).
Democracy works by elevating the most popular choice. Sometimes it turns out well. Often it does not, or the USA would have a different (most likely better) president than the current, once-most-popular, choice; and the UK would not be leaving the EU.
TIOBE merely reflects a fairly crude comparative assessment of the popularity of different languages. While one can pick holes in their methodology, and see shortcomings in the yardsticks they use to produce their statistics, it is not so far from reflecting current developers' preferences that it is useless or worthless. Pascal, by whatever measure, does not fare well. So what?
This was a joke because it seems like a lot of people here seem very concerned with the perception on the popularity of Pascal.
Actually Pascal comes of pretty good in the tiobe index, if you take another metric like share of projects on github, Pascal lands somewhere in the lower half, while on tiobe it's somewhere on place 2x or so (didn't bother to look up).
Pascal is not very popular right now, which I think can be blamed on many things, to name the two most important ones in my Oppinion:
1. the poor marketing choices of borland and co, who guarded the most well known compiler for this language behind a few kilo€ paywall, and only recently added a "community edition" (even though they seem to not know what this term actually means) which is much much worse than comparable community editions like Visual Studio or the JetBrains products.
Lazarus while having some popularity now, was back when I started using Delphi (about 10-12 years ago) pretty buggy and also not really well known. If Embarcadero would have put out an "Community Edition" (back then they would have probably named it free edition or so) of XE in 2010 I bet the situation would be totally different.
2. .Not took the Niche on windows. The big thing about Delphi was Rapid GUI development, which suddenly was much easier with .Not If I compare Delphi XE with VS 2008, VS is better in nearly any regard, it was faster, had more features and most importantly didn't crash every 10 minutes (honestly I only tried the test version for 14 days of XE and have stopped using it because it was unusable).
I mean if I look to today, languages like C#, Java are making a lot of things much easier than in Pascal, tooling for such languages (especially java) is much better, and in the bare metal programming niche, C, C++ and Rust are much better because they are tuned for such things.
I use Lazarus most importantly because I really like the language and it's open source (and I really like these oldschool bare metal programming, being able to test and use all the quirks of the underlying architecture just makes me happy, things you simply can't do in java or so). But if someone just wants to learn a language to get things done, I would most probably recommend Java, C# or some other language, because in the end, they make life much easier in many regards. (But I would recommend it for example to someone who wants to learn how to program out of interest to learn how computers and programming works, I think here pascal is really great)