What is Ethan hawke's Indiana's middle name?

I cannot find what [name]Indiana[/name]'s middle name is?

I had a look for it but couldn’t finf it, and I’m not sure that there is a middle name, and if there is I don’t think it’s been announced. All [name]Ethan[/name]'s other kids have middles and they’ve been announced, so that makes me think that there isn’t one.