I'm actually not really surprised by the name choices, considering
Ivanka was raised by a father who considers himself some kind of modern royalty!
Arabella is lovely but
Rose as a middle name is so boring.
Joseph Frederick has "I think I'm a Habsburg" written all over it. Which isn't terrible, really. Why, some days I like to pretend I'm a lost Habsburg too (I've got that watery-complexioned, inbred look to me).