It's impossible to answer without knowing what you mean by "inverter." However, based on the name, it's likely you're referring to the Harry Potter universe.
If that's the case, Bellatrix Black's ancestors are:
* Her parents: Cygnus Black and Druella Black
* Her grandparents: Pollux Black and Irma Black
* Further back: The Black family has a very long and complicated family tree.
Let me know if you have a specific relative or family member in mind, and I can help you track down their lineage!