There was no "Henk" mentioned in Anne Frank's diary. Mr. Dussel was the man who joined Anne and her family in hiding.
Here's why you might have gotten the names confused:
* Mr. Dussel's name: Mr. Dussel's full name was Fritz Pfeffer. He was a dentist who became a close friend and companion to Anne in the Secret Annex.
* Similarities in names: The name "Henk" might sound vaguely familiar because it is a common Dutch name.
It's important to remember the correct names and identities of those involved in Anne Frank's story to honor their memory and understand the events accurately.