He passed away about 10 years ago, and created a large oeuvre of stories (mostly running text illustrated by smaller thumbnail images across the top third of the page) revolving around several anthropomorphic personages: “Tom Puss”, a smart fellow (cat); “Ollie B. Bommel”, a good-natured but naïeve and blundering bear in a loud jacket who dwells in a castle due to an inherited fortune and many others.
The setting is heavily influenced by Irish folklore, because Mr. Toonder dwelt in Ireland for a long time. It seems that he maintained in interviews that he even encountered some of the “little folk”, who also play an important part in his stories.
Well, one of that little folk is called Kwetal (which sounds similar to Dutch for “I know everything”) who is a kind of dwarf / elemental, and who oftentimes constructs very strange devices that for instance transports things to another world or dimension.
Because Kwetal has an inexplicable high opinion of Bommel (he thinks that Bommel has a “huge mental frame”) he sometimes trusts Bommel with his contraptions who then gets into deep trouble - and Tom Puss has to save him.
Now, one of Kwetal’s devices is called an “Oloroon” (or “Space Siphon”) that creates access to other worlds, often described as “dream worlds” or “the subconscious”.
Ok - getting to the point at last - there’s a footnote in the Wikipedia page about the Oloroon that goes like this: (translated from Dutch):
The word “Oloroon” may relate to Olórin, one of the names of Gandalf, meaning “dreamer” or “of dreams”, from the stem olor-, in Quenya, the language that is spoken by the elves in the works of J.R.R. Tolkien