This is the 4011th most frequent Polish word.
wiktora
"Wiktora" is the genitive or accusative singular form of "Wiktor," a Polish male name meaning "Victor."
The word 'Wiktora' is in the accusative case, referring to the person Wiktor as the direct object of the verb 'spotkałem' (I met).
Spotkałem dziś Wiktora na ulicy.
I met Wiktor on the street today.
Here, 'Wiktora' is in the genitive case, indicating possession.
To książka Wiktora.
This is Wiktor's book.
In this example, 'Wiktora' is actually used as 'Wiktorem' in the instrumental case to indicate the subject with whom the action was performed.