"From Wikipedia, the free encyclopedia Alekhine Nouri (born December 12, 2005) is a Filipino FIDE Master. Named after Russian chess player Alexander Alekhine, Nouri became the youngest Filipino FIDE Master and the youngest FIDE Master in the world at the age of 7."
It seems like this person is who you are looking for.
There has almost certainly never been a "world's best player" in the last few hundred years who would lose to some of the weak CMs around today (or even in 2020). You do not need a rating of 2200 to be a CM in today's world. You can be sub 1200 and "win" the title by finishing in the first 3 in a continental championship for under 8's.
Perhaps worth noting why the question has attracted down votes. If you hover your mouse over the down arrow it starts off by saying :This question does not show any research effort".
It is worth pointing out that one of the best places to start your research is this forum. Searching for questions about candidate master titles gives a number of useful ...
A rather half-fledged answer but here goes:
Check out https://ratings.fide.com/download.phtml.
Download the data files for each month from the archive and parse them into a single database or dataframe. If interested in Rapid and Blitz ratings, these have to be downloaded separately from Standard (= classical).
Each month's data contains , <player_ID>, ...
Ah here: the ff have reached 2500+ according to this but aren't GM:
Since all the peaks are 2500-2502, I'm just gonna assume the time they got the peaks is the 1st time they got the peaks sooo...
Lela Javakhishvili - 2500 in March 2010 at the age of 25
Almira Skripchenko - 2501 in January ...
My research tells me, that FIDE has only started rating players from 1970/71 on.
There are multiple databases listing players, for example OlympBase, which contains the ratings of all (?) FIDE-registered players from 1971-2001, after which year, one can consult the current FIDE-list (which doesn't store ratings before then, apparently)...
Oh wait it's on wiki because 'age' is 'age obtained' (duh!). Ok so the list just goes
Nona Gaprindashvili - 37
Maia Chiburdanidze - 23
Susan Polgár - 22 (Note: Susan Polgár became GM in Jan1991 while Judit Polgár became GM in Dec1991.)
Judit Polgár - 15 (15 years and 4 months)
Humpy Koneru - 15 (15 years, 1 month, 27 days)
Hou Yifan - 14
Bonus: If we ...
The current and 9-time British women's champion hself (or perhaps I should really say 'herself' to emphasise the women's championship) says on twitter:
The short answer is I’m proud of both titles and I don’t mind which one is used. I always refer to myself as an IM..but there are situations where saying (or writing) WGM just fits better (because it sounds ...
I suspect it's related to why women can compete in women's chess championships without being a GM.
Eg 1 the US women's chess championship or the british/UK women's chess championship have been recently won by non-GMs: Nazí Paikidze, Jennifer Yu, Sabina-Francesca Foisor, Jovanka Houska (current), Akshaya Kalaiyalahan.
1.1. The current US women's champion is ...