This is the 5577th most frequent German word.
bettina
"Bettina" is a German female given name, derived from "Elizabeth."
In this sentence, 'Bettina' serves as a proper noun, specifically a person’s name acting as the subject of the sentence.
Bettina liest jeden Abend ein Buch.
Bettina reads a book every evening.
Here, 'Bettinas' is used in the possessive form to indicate ownership of the book.
Das ist Bettinas Buch.
This is Bettina's book.
In this sentence, 'Bettina' again serves as a proper noun referring to the person who was met, working as the object of the verb.