Surname convention trivia: The lower case "de" is only used when preceded by another part of the name, like first name, initials, or another part of the last name. When used on its own, or prefixed by a title like Mr., then "De Raadt" is correct. Here's a description of this: https://www.dutchgenealogy.nl/how-to-capitalize-dutch-names-...

So e.g. you would write Vincent van Gogh, V. van Gogh, Mr. Van Gogh, or Van Gogh.