Hello. My name is Michael.
I can help you with this.
I keep in touch with my old classmates and have for many years.
There is a service that is integrated into facebook that makes it very easy.
It's called "Classmates"
It's free to register.
You can also go there directly on facebook
Classmates on Facebook
Classmates is a free service.
To add the name
You can go into account settings
Click general on the left column
Find name and click "edit"
Then you can enter your maiden name there. You MUST click "Include this on my timeline" in order to make it searchable.
I am answering your original question. I was trying to help you, but I will answer only your question if that's what you want.
The directions above will allow you to add it as an "alternate name"
Here is the facebook page with instructions on adding a maiden name: How to add an alternate/maiden name to facebook
The important part of the process is to "add this on my timeline"
I've found staying in touch with my classmates to be extremely rewarding, so I can understand your wanting to.
I never really considered the difficulty a married woman might have doing that.