Panteleimon Kondratyevich Ponomarenko (Пантелеймо́н Кондра́тьевич Пономаре́нко) was a Soviet politician and one of the leaders of the partisan resistance in Belarus during WW2.
His face is the main default portrait for leaders in the grand-strategy war game Hearts Of Iron IV (HOI4).
His name has also become a sort of inside joke.
bro1: Hey, why is the leader of (country1) the same guy as (country2)?
bro2: The leaders have yet to have correct portraits, the one you're seeing is the default portrait, his name is Panteleimon Ponomarenko
bro1: Thanks for enlightening me bro.