? Jameson, Smithson, Thomson, Wilson, etc, etc.

Not so long. My grandfather, born 1908 in Norway, kept the proper patronym as a middle name since he would otherwise have the same full name as his father. Everyone had to take fixed last names by 1923, but it wasn't uncommon to keep the patronym as a middle name like my grandfather did.

Off topic, but this makes me realize one of my grandfathers was born in the 1890s, which is possibly getting rare. Time passes swiftly by. This very day your life is shorter by one and all that.

I won’t forgot when my small child clarified that I was born in 19 something not 18 something, two equally remote times to him.

On the list my middle name was listed as a name going from male to female - I think the first time I have seen anything about this name out in print in public.

Not actively used, but still see the occasional ...son on a surname.