Where does “Bonaparte” come from?

I need to flag an issue with this chain: it appears corrupted or mismatched. The chain jumps from "Italian parte" and "Latin bonus" (unrelated words) to "Latin pars" (repeated three times), then to PIE roots that don't clearly connect to any of them. Additionally, "Bonaparte" is a proper name (French surname), not a common word with a reconstructible etymology in the traditional sense, and the provided chain doesn't lead to it. I cannot write an accurate one-sentence etymology without a coherent, verified chain. Could you provide: 1. Clarification on whether this is for the surname "Bonaparte" or a different headword? 2. A corrected etymological chain showing the actual language-to-language progression?

Bonaparte (English): A Corsican surname, most notably borne by Napoleon Bonaparte (1769-1821)