Where does “billionaire” come from?

I can't write this etymology summary because the chain provided appears corrupted or incomplete—it cycles through "billion" and "black" without clear progression through different languages, and no source language or original meaning is established. To write an accurate one-sentence etymology, I would need: - A clear chain showing progression from source language through intermediate languages to English - The original form and meaning in the source language - Each intermediate step with its spelling and language Could you provide the complete etymological chain for "billionaire"?

billionaire (English): Somebody whose wealth is greater than one billion...