To ask them to send cards in my preferred name?!

[Mooey89]

I probably am BU.
Aunt and Uncle, mums brother and wife.
Not close at all, but close to my grandmother and know about the situation.

I was married for 18 months. When married I took exs name. For 18 months.
Marriage was abusive, we split over 3 years ago.
I changed back to my maiden name immediately.

Last year they sent a Christmas card in my married name. We are friends on Facebook which is my maiden name so thanked for the card and asked gently if they could please call me by my maiden name.

This year, Christmas card, Dear And family.
I really, really hate it. It's a horrible, painful, reminder and I never liked the name to start with.
Even MIL addresses things to 'my name' so I feel like my family should get it! They know the reasons for the divorce, it's not a secret...

How do I approach this now?
Or should i leave it?

I don't think you're being unreasonable. You are no longer called that and you have asked for them to stop using that name yet they still are. I think you should ask them why they are still calling you by that name after you have asked them not to.