Harry Potter fans are still debating the spell Molly Weasley used to kill Bellatrix Lestrange. Fans speculate Molly's motherly rage heightened a simple Stupefy spell targeting Bellatrix's heart.

The point here is that, while Delphini Lestrange is the apparent end of the family line (as far as we know), she shouldn't exist in the first place, because the idea of Voldemort and Bellatrix ...