Here we go again.
What do you have to do to completely destroy a perfectly good pair of names for all time?
Adolf and Ava, as a pair, are pretty appealing on the surface. Note the A-dolf, A-va assonance. They sound really good together, an important consideration when naming a set of twins. Ava is a hot name right now for little girls. And with good reason. Its cute and spunky! There is also an intriguing historical context to the pair, a compelling story. Ava and Adolf were lovers, I guess. It didn't end prettily, but there must have been some romance along the way. Something like affection.
On the other hand, Adolf Hitler was not a good person. In fact, he's commonly regarded as the most evil person to ever live. So, we have to take into consideration. Especially because Hitler was, like, famously evil.
Conclusion: Adolf and Ava are a strong pair and would be attractive for a boy-girl set of twins had Hitler not forever besmirched the name Adolf by being a genocidal maniac and a general douchelord.
Back to the drawing board.