This is the 3575th most frequent French word.
jakub
"Jakub" is not a French word; it is a given name, equivalent to "Jacob" in English.
Here, 'Jakub' is used as a proper noun referring to a person's name.
Jakub aime lire des livres chaque soir.
Jakub enjoys reading books every evening.
In this sentence, 'Jakub' is used as a direct object, showing whom the subject saw.
Hier, j'ai vu Jakub au marché.
Yesterday, I saw Jakub at the market.
This example uses 'Jakub' as the indirect object of the verb 'parler', denoting the recipient of the speech act.