This is the 10776th most frequent German word.
rudolf
"Rudolf" is a German masculine given name, equivalent to "Rudolph" in English, meaning "famous wolf."
In this sentence, 'Rudolf' is used as the origin of the action, stating that the message was sent by Rudolf.
Wir haben die Nachricht von Rudolf erhalten.
We received the message from Rudolf.
In this sentence, 'Rudolf' is used as a proper noun, referring to a person's name.
Rudolf ist mein bester Freund.
Rudolf is my best friend.
Here, 'Rudolf' is used as a possessive noun, indicating that the book belongs to Rudolf.