Latin Names

I've chosen to go with some latin names this story I'm writing, but I'm not quite sure how to capitalize "de la", "del", "de."

Example name (with title): Councillor Lenora de la Chievre.

If I take away the first name, is it Councillor de la Chievre, or "De la", or "De La", or still "de la"?

If I take away the title as well as the first name, is it "De la", "De La" or "de la"?

It feels natural to just capitalize the first letter, be that the title, first name or the first letter of the prepositions. I've googled myself crazy on this stuff, and I just keep finding contradictory information. Also, it seems the rules change depending on whether it's Spanish/French/etc.