Question: I was wondering if in the books, or in any other literature/discussion about the story, whether Professor Kirke is Mr. Tumnus' father? They certainly looked like each other in this movie and it seemed to be implied during the scene in the credits.
Answer: The professor is not Tumnus's father. In the credits scene, the professor wants to get back to Narnia because he was there as a boy (in the book "The Magician's Nephew").
Xofer