Hi:
I answered your question over on the Google Voice forum.
The contact name import on the OBiTALK portal is useless for OBi ATAs, unless you pay to subscribe to OBiEXTRAs. It won't match names to numbers on inbound calls. And, that's the problem: you can't manage the imported list of your Google Contacts on the OBi device.
Google Voice, by itself, does not send caller name - just the number.
Anything you see on your cordless phone's LCD screen is coming from the address book on that phone. If you want your daughter's name to appear, then add it to your own telephone's address book.