A little a propos the "twins" debate and FTM:- how's about entering info on , let us say, Mr John Brown, born 1900; and his wife Mrs Mary Brown whose maiden name one does not know? Entering ' Mary Brown' in the 'Wife' slot will not help any future research. I would put 'Mary Mrs 1800 John Brown' until I discovered her maiden name. Perhaps there is a more conventional solution but the above "does me".