Listing all used names on forms? Advice needed

[Derry Lea 2]

Hi, all,

 

So I am applying for a green card for my mom. She has been divorced from my dad for the past 3 years. I'm planning on listing her married name which she is still using and to also list her maiden name n the names section. The issue is 17 years ago she changed her first name which she always hated. All of her documents including her birth certificate and passport are with her current name...In fact there is no memory or proof of the given name she was born with as even her birth certificate has her listed with the name she chose 17 years as her first name and her maiden name as last name....So my question is as there is no way to explain the name change or any proof of it is there any point of listing it in the forms? I am afraid they will see she has used a different name and require some sort of document where it has been used and there is none...

Please advise, thank you