This is the 4015th most frequent Portuguese word.
marcus
"Marcus" is a proper noun, typically a male given name in Portuguese, equivalent to "Mark" in English.
Here, 'Marcus' is used as a subject, referring to a person by their proper name.
O Marcus é um excelente jogador de futebol.
Marcus is an excellent soccer player.
In this sentence, 'Marcus' is used as the object of the verb 'conversei', indicating the person with whom the action of talking occurred.
Eu conversei com Marcus sobre o campeonato.
I talked to Marcus about the championship.
Here, 'Marcus' functions as the subject in the subordinate clause within the sentence, indicating the individual performing the action of arriving.