It sounds like she had been either abused or her heart was broken by being abandoned by her "people" and given a different name! Try out different names on her and she if she responds to anything. But also get into the practice of daily walks and take her with you wherever you go, if you can. If she is small, pick her up and put her in some sort of carrier and carry her around. If not, there is something called "Wake", where you simply spend the night with your dog in a chair or on the floor and sleep next to it on its territory. I adapt kittens and puppies to my household this way -- I have the new animal in the laundry room with the linoleum floor for accidents until the animal is litter-box trained or housebroken, but I bring in a stack of books and snack and sit on the floor of the room with it and simply be with the animal for blocks of time, so that it gets used to my presence and adapts to me. It takes a few days before it comes up to me of its own accord, but once it does that, we have established a bond and we are good to go out into the rest of the house and explore. Get a comfy chair and pick up new dog and have it on your lap as you watch tv, or sit down with it in the sunshine together, no demands, just hanging out, and eventually she will respond better. It does take a few days to adapt to new smells and sounds and a new name, so just kick back and be chill with her with no demands. It took my sister's 18-year-old cat to adapt to our house, but she is a Siamese cat and very particular. But now that she has found that my carpet is quite comfortable and even better in the warm sun by the window, she is sleeping much better than she ever did in my sister's apartment. So give the new dog some time, but make time to hang out and relax with it. "Down" time is just as important as "Up" or "Fun" time with a dog. "Down" time is when they establish trust with another creature, so give her some "Down" time hanging out and she will adapt better. Good luck!