Some sites give vague data regarding player popularity

All this shows us is that a lot of people search for LeBron James statistics. We can however cross check and see that the Warriors are more popular as a team for searches which makes it more impressive.

Giannis is in the same position as the Bucks, ie, nothing special. They also give us an idea what people search for in relation to Giannis, ie Related Searches:
Giannis Antetokounmpo career 40+ point gamelog
When was Giannis Antetokounmpo drafted?
Giannis Antetokounmpo stats in the 2017 playoffs
Here is the Google Insights view of interest in Giannis over time globally, peaking for the championship run, otherwise pretty regular around the playoffs and the trade talks every year.

And yes, it’s mainly Greeks looking for information about Giannis:

In Greece in particular it is interesting that we have a different swell in searches focused around whether or not he will join the national basketball team:

Also interestingly, it is mainly richer suburbs of Athens that are looking for Giannis related info:


It also quickly becomes

apparent that Greeks really get excited and look for how to vote for him for the All Star voting process.
Related queries are related to his height, his house and his siblings too: αδερφια αντετοκουμπο
αντετοκούνμπο υψοσ
giannis antetokounmpo nba vote
antetokounmpo mvp
σπιτι αντετοκουμπο
αδερφια αντετοκούνμπο
γαμοσ αντετοκουμπο mariah injury francis φρανσις παιδιά

Of course to put things into perspective, here is a geographical breakdown by region compared to Jokic (in red) Globally Jokic is more popular, here is a breakdown of interest over time:

So no, Giannis is nowhere near the most popular NBA player on the planet. If anything the interest is fading.
