The phrase ik ben Willem is simply Dutch for I am Willem, and no confirmed original source, character or release year is attached to this recording. Clips with plain spoken introductions like this spread on soundboards because the name and language make them easy to reuse as a running joke, especially among Dutch speaking users sharing short voice notes. It stays in use as a meme sound effect because the serious tone contrasts with silly edits, streams and group chats where an unexpected introduction gets a laugh.