Yes, his name is Alexander Arbisman
As it is not a notable person, place, or thing, acronym is a word without initials, or a need for them.
Donny Osmond
fergie
The initials are also known as the return address so when the person writes back they can address you correctly
The word you're looking for is "initials."
It is superlfuous to give reference initials if they only tell you that the author of the letter was also the typist. Such initials are only of interest if the typist was another person than the author.
Billy Idol
william yeats
elibeth rome
Allen Iverson
Because it is a interesting way to identify a person.
Mike Bloomberg