Where on Earth is Adolfo Hitler
Looking on linkedin, one can find people whose first names are Lenin, Stalin, and Hitler.

Just to make sure that it's not a coincidence, I looked for people whose names were not just "Lenin" but "Vladimir Lenin" and not just "Hitler" but "Adolf Hitler".

Lenin Vladimir is a first name popular among professionals in Latin America.

Lenin Vladimir Urbina Urbina (Honduras) https://www.linkedin.com/in/lenin-vladimir-urbina-urbina-82501ba8/
Lenin Vladimir Escobar Almendárez (Nicaragua) https://www.linkedin.com/in/leninescobaralmendarez/
Lenin Vladimir Ramirez Diaz (Mexico) https://www.linkedin.com/in/lenin-vladimir-ramirez-diaz-2a63674b/
Lenín Vladimir Solórzano (Salvador) https://www.linkedin.com/in/len%C3%ADn-vladimir-sol%C3%B3rzano-a00a8467/

Occasionally, young professionals called Vladimir Lenin show up in other countries, for example:
Vladimir Lenin Legaspi (born in Philippines) https://www.linkedin.com/in/vladimir-lenin-legaspi-25154519/

There are a total of 15 people on linkedin with this first name. I did not count a "Vladimir Lenin Putin De Loayza Dias" from Peru, https://www.linkedin.com/in/lenin-vladimir-putin-de-loayza-dias-a9061456/ and I also did not count people whose first name is just "Lenin" or who set up phony linkedin accounts such as "Vladimir Lenin, supreme leader, KPSS" and so on.

There are many more named "Vladimir Ilyich":

Vladimir Ilyich Mendoza Lopez (Colombia) https://www.linkedin.com/in/vladimir-ilyich-mendoza-l%C3%B3pez-9539ba18a/
Vladimir Ilich Arredondo Cazeneuve (Peru) https://www.linkedin.com/in/vladimir-ilich-arredondo-cazeneuve-157a8123/
and about 35 others with this first name, coming from Peru, Honduras, etc.


Joseph Stalin:

Joseph Stalin Alucious Selvaraj https://www.linkedin.com/in/joseph-stalin-alucious-selvaraj-95335724/
Joseph Stalin Sagayanathan https://www.linkedin.com/in/joseph-stalin-sagayanathan-342081193/
Joseph Stalin Pitchai Pillai https://www.linkedin.com/in/joseph-stalin-pitchai-pillai-25b30388/
Joseph Stalin Erni https://www.linkedin.com/in/joseph-stalin-erni-6b83b95a/
Stalin Joseph Tallara https://www.linkedin.com/in/stalin-joseph-tallara-87b7b362/
There are 19 people whose first name is Joseph Stalin.
Additionally, there are dozens of people all over the world with the full name "Joseph Stalin". Not sure what to make of that.


Mao Tse Tung:

Mao Tse Tung Tsoyi Ambassa (Cameroun) https://www.linkedin.com/in/mao-tse-tung-tsoyi-ambassa-69851a155/
Mao Tse Tung Brito Silva (Brazil) https://www.linkedin.com/in/mao-tse-tung-brito-silva-0a7752108/
Three more people have "Mao Tse Tung" as various parts of their name, not clear that it is their first name.


Stalin Mau-Mau: A name popular in Zimbabwe and some other countries.

https://www.linkedin.com/in/stalin-mau-mau-a7011390/
https://www.linkedin.com/in/stalin-mau-mau-912744a3/
https://www.linkedin.com/in/stalin-tawanda-mau-mau-776b31133/
https://www.linkedin.com/in/stalin-tawanda-mau-mau-358b2945/
https://www.linkedin.com/in/stalin-mau-mau-7b5a1934/
https://www.linkedin.com/in/stalin-mau-mau-7627179b/
https://www.linkedin.com/in/stalin-tawanda-mau-mau-49b60272/


Turning now from international to national socialism, I looked for Hitler and Mussolini. Linkedin has lots of people whose first name is Hitler, - many of them in India. Again, to exclude any possibility of coincidence, I looked for "Adolfo Hitler" (the Latin American version). There are several of them, but significantly fewer than the Lenins and the Stalins.

Adolfo Hitler:

Adolfo Hitler Gil Vasquez (Peru) https://www.linkedin.com/in/adolfo-hitler-gil-vasquez-0397ba8b/
Adolfo Hitler Huaman Diaz (Peru) https://www.linkedin.com/in/adolfo-hitler-huaman-diaz-05351b47/
Adolfo Hitler Arevalo Vergara (Colombia) https://www.linkedin.com/in/adolfo-hitler-arevalo-vergara-99110744/

In total, there are 5 people with this name, all coming from Latin America, and 8 more are just "Adolfo Hitler", which makes it unclear whether it is a first name. Nobody has "Adolf Hitler" as their name.


Benito Mussolini:

Mussolini Benito Cabello Chavez (Peru) https://www.linkedin.com/in/mussolini-benito-cabello-chavez-66ab66b5/

12 more people have the full name "Benito Mussolini", but it's most likely not their first name.