* This is a personal name: It could be a private individual who is not publicly known.
* The name is misspelled: There might be a slight error in the spelling.
* It's a fictional character: The name could belong to a character in a book, movie, or other form of media.
To find more information, you could try:
* Searching online: Use different search engines and variations of the name (e.g., Engelbert Croonenburg, Van Croonenburg).
* Checking specific directories or databases: If you have any more context about this person, such as their profession or location, you could search relevant databases.
* Asking for clarification: If you got the name from someone else, ask them for more information.
Without more context, it's difficult to say who Engelbert J. Van Croonenburg is.