Hey jurgen--welcome to our AndroidForums!
I don't think anyone really / quite understands the specifics of what might trigger a little scrutiny by Google of a given Android app, although I guess I wouldn't be surprised by a change in the app automatically triggering an automated review of some kind :dontknow:.
The published name on the Play Store should be what your app represents in it's display--I can see them dinging you on that, especially if it's a name that is already in-use by someone that already owns the rights to it.
[the package name would not matter, since I think the vast majority of app users are totally and blissfully unaware of an app's package name]
It could also be that the name you chose (or your app's contents or function) does violate Google's impersonation or intellectual property ("IP" that you mentioned?):
Google Play Developer Program Policies
- Impersonation or Deceptive Behavior: Don't pretend to be someone else, and don't represent that your app is authorized by or produced by another company or organization if that is not the case. Products or the ads they contain also must not mimic functionality or warnings from the operating system or other apps. Products must not contain false or misleading information in any content, title, icon, description, or screenshots. Developers must not divert users or provide links to any other site that mimics or passes itself off as another app or service. Apps must not have names or icons that appear confusingly similar to existing products, or to apps supplied with the device (such as Camera, Gallery or Messaging).
- Intellectual Property: Don’t infringe on the intellectual property rights of others, (including patent, trademark, trade secret, copyright, and other proprietary rights), or encourage or induce infringement of intellectual property rights. We will respond to clear notices of alleged copyright infringement. For more information or to file a DMCA request, please visit our copyright procedures.
Without seeing your app or knowing it's contents, we can't really give you any guidance as far as what they found objectionable (one of the main, major failings of their notification polices: i.e., they will not tell you specifically what they found in violation :banghead

.
Google is getting a little better in this regard, but they still have a long way to go, in my opinion.
I hope that helps a little.