Where does “普京” come from?

普京 (Chinese) comes from Russian Пу́тин, from Russian -ин, from Old East Slavic -инъ, from Proto-Slavic -inъ, from Proto-Indo-European -iHnos, from Proto-Indo-European -no- — adjectival suffix.

Ancestry of “普京”, step by step

Step	Language	Word	Meaning
1	Russian	Пу́тин	—
2	Russian	-ин	-'s
3	Old East Slavic	-инъ	—
4	Proto-Slavic	-inъ	-ine; Creates singulatives, mostly with...
5	Proto-Indo-European	-iHnos	Creates adjectives of materials
6	Proto-Indo-European	-no-	adjectival suffix

Every word from Proto-Indo-European -no- →Every word from Russian -ин →Every word from Russian Пу́тин →