Before revision: The particle can also be du ('of the' in the masculine form), d' (used, in accordance with the rules of orthography, when the nom de terre begins with a vowel; for example, Ferdinand d'Orléans), or des ('of the' in the plural).
After revision: The particle can also be du ('of the' in the masculine form), d' (used, per the rules of orthography, when the nom de terre begins with a vowel; for example, Ferdinand d'Orléans), or des ('of the' in the plural).