This is the 3532nd most frequent Polish word.
albert
"Albert" in Polish is not a standalone word with a specific definition; it is typically a proper noun, used as a male name.
In this sentence, "Albert" is used as a proper noun to refer to a person's name.
Albert mieszka w Warszawie.
Albert lives in Warsaw.
Here, "Albert" is the accusative form of the proper noun "Albert," used after the verb "to see."
Czy widziałeś mojego przyjaciela, Alberta?
Have you seen my friend, Albert?
In this case, "Albert" indicates the creator of the painting, showing personal attribution in the genitive case.