Add a date field for Alternate Name entries
I think it would be very useful for the Alternate Name entry to have a date field. That way you could list a range of dates for a person in such circumstances as:
(1) going by their original German birth name (Carl Wilhelm VonBergheim) and when they changed to an anglicized version (Charles William Bergheim).
(2) step-children permanently using step-father's surname after their mother's marriage date.
(3) man using an alias after a certain delicate situation involving the law (and then returning to his original name decades later when he found out the lawman had survived, and the man wished to claim his Civil War soldier's pension that he'd earned under his original name).
(4) when people changed their names because they disliked the name given by parents. From records our family can identify a short timespan when uncle Milburn decided he would rather be Melvin and he used Melvin for rest of life.
The dates would be helpful for research (do you look for old name or new name in 1920 census) and organization.