As far as I know, you can use whatever name you want if you buy it. There might be a case against you if you were selling something that a competitor sold, with a similar name. For instance if you bought McDonalds. net and sold burgers. When I bought my domain name I was offered, but did not take up several similar names, so they are out there to buy. As for Fance, not a clue. However if I am wrong, someone will let you know.