I wouldn't call it confusing because the rules are very regular. Prepositions and articles are lowercase unless they start the sentence, the same rules apply to spelling in titles (eg. book titles).
And nitpick: you likely meant “Willy Vandersteen” (https://en.wikipedia.org/wiki/Willy_Vandersteen), but that would be a bad example as it, I think, would always be capitalized, also if he were Dutch.