I have a fairly quick question. I am wondering if I should capitalize a last name when it comes at the start of a sentence if it starts with a lower-case letter.
Example: In my essay, I am citing Alexis de Tocqueville. After I've introduced him I have a sentence that is something along the lines of "de Tocqueville stated XYZ", with the "de" being the first word in the sentence. Should I capitalize "de", or leave it as is because that's how it's formatted in his name?