My mother in law has just sent me a note to let me know that she's had to address my son's Christmas presents to my husband as she's not sure what name I go by nowadays.
She's only known me for 20 years, and what with me keeping exactly the name name for that entire time I can see how that's hard to keep track of 
It's funny, no one ever seems baffled by my husband having the same name for his entire life, but apparently me doing the same is confusing for everybody involved.
(lets just skip neatly over the "had to" send the presents to him. Obviously, having a penis is not optimal conditions for receiving post on behalf of your children).