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

pic2

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 “
July 31, 2009 at 6:55 am
Kaliningrad/Konigsberg
Mikhail Kalinin
Euler
Hummer
July 31, 2009 at 7:21 am
X – Konigsberg
1 – Euler
Y – Kalingrad
2 – Mikhail Kalinin
1 found special path around 7 bridges of X. 2 later came and someone hijacked the name and renamed X as Y.
July 31, 2009 at 8:25 am
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…..
July 31, 2009 at 8:27 am
Konigsberg,Euler,Kalinin.
July 31, 2009 at 11:08 am
leningrad, euler, st. petersburg?
July 31, 2009 at 5:57 pm
First picture is that of Mikhail Kalinin.
Second is that of Euler
He found the solution to Koneigsberg’s problem.
Koneigsberg was the name of the city later renamed to Kaliningrad