I had this with my HTC Desire. It was the system not recognizing the name I think and not a problem with the phone. At least you don't get the "pardon" which drives me mad.
So sorry to hear your sad news Jay, I feel for you and your family. Your Mum was obviously a very talented & determined lady with a whole lot of love in her heart. Keep her in your heart and mind and she will always be with you.