X, a place,  is presently named after the commie dude shown in pic1.

X was previously known as Y, which figures in a  famous problem, first solved by the math dude shown in pic2.

And in the general direction of X, I present the clue pic3.

Full connections please. [ X - pic1, Y -  pic2 ]

pic1

pic1

pic2

pic2

pic3

pic3

Cracked completely by Srikanth, Royan, Kaustuba, Tul and Goutham.

and partially by wanderlust

Answer:

Quoting His Highness Royan,
” X – Kalininigrad (named after Mikhail Kalinin)
Y – Konigsberg (Math dude in Pic 2 is Leonhard Euler )

Pic 3 is a Hummer…. Hummer model H2 is now produced in Kaliningrad(Konigsberg).
Konigsberg problem is a graph theory problem associated with Leonhard Euler.
Konigsberg was renamed Kalininigrad “