Is it true that naming one's daughter Fatimah or Khadijah protects against poverty?

There is no authentic or weak hadith that mentions this, and it is a saying of some people that is not valid legally or rationally. It might be an interpolation from some sects who exaggerate about Fatimah and Khadijah, may Allah be pleased with them both. Naming children after the Prophet's wives and daughters is religiously commendable.