Thanks for your welcome 'darkeyes'. I've tried introducing my name to my wife when she speaks to me and all she says is, "I know, I know." It's very weird really because both my wifes parents always addressed each other by their respective Christian names, so that should in theory have rubbed off onto their daughter. My wife has two sisters who have no difficulty with their verbal addressing. I've talked with my wifes parents and they can offer no explanation as to why she has this mental block of my name. They cannot associate any bad experience in the past with anyone called John, so that rules that one out. We do get on extremely well and know each other to the point of knowing what each is going to say, and even thinking, almost telepathic really, it's funny at times, we can laugh at a situation without having to say a word. That is supposed to indicate a good bonding apparently. It truly beats me as to what the problem is. During our many discussions on this subject I suggested officially changing my name to one which she felt able to use, this was viewed as quite silly and "over the top". I do believe at this late stage that I'll have to live with this situation for the rest of our days together as much as it distresses me.
Many thanks again, John