This is the 7104th most frequent Portuguese word.
karl
The word "Karl" is not native to Portuguese; it is typically a Germanic first name.
In this sentence, 'Karl' serves as the proper noun referring to a person's name, the subject of the sentence.
Karl gosta de estudar história.
Karl likes to study history.
Here, 'Karl' identifies the recipient of the action, showing it as the object of the prepositional phrase.
Ela deu um presente ao seu amigo Karl.
She gave a gift to her friend Karl.
This usage of 'Karl' is in a question form, identifying a third party the speaker is asking about.