This is the 4353rd most frequent Turkish word.
viktor
"Viktor" is a proper noun, a male given name, equivalent to "Victor" in English.
The word 'viktor' is used here as a proper noun referring to a person's name.
Viktor dün kütüphaneye gitti.
Viktor went to the library yesterday.
The word 'viktor' is again a proper noun, and it is used metaphorically to refer to someone's thought process.
Viktor gibi düşünürsek, bu sorun çözülebilir.
If we think like Viktor, this problem can be solved.
'Viktor' functions as a proper noun referring to an individual who offered assistance.