Interesting question! (Similarly, I'm more familiar with "ara" prefixes; from my identification strategy, though, "Ara" isn't a common standalone name in the way "Ada" is).

As it turns out, this isn't a bug --

"Adalynn" has been in use (with n>5 instances) since 1996, and is really on the rise since ~1007. In 2017, there were 2.651 female sex babies given the name "Adalynn"

"Adamary" isn't used with the frequency that "Adalynn" is given, but we're seeing its use along a similar timeline -- the name first crossed the (n>5) threshold in 1998, and it has been used at least that many times every year since. While its usage is declining recently, in the early 2000s it was typically given ~40 times per year.

Similar stories with "Adabelle" and "Adabella", though the timelines are different. "Adabell" is a *much* older name -- it was given to a handful of female sex babies starting in the early 20th century -- we see n>5 uses quite frequently from 1900 - 1931, then it falls off the radar until 2006.

"Adabella" looks more like "Adamary" -- wasn't really in vogue (if you can even say that about a VERY rare name) until 2008.