What are the possible reasons my ex's new girlfriend blocked me? How would she even know my name to block me?

BrunetteBabe1005
I'm honestly curious because I don't speak about my ex on Facebook at all! I don't know anything about his life until one day my friend screenshotted me his profile and it was a pic of him and his new girlfriend. I curiously typed in her name and she blocked me. She also blocked my mother. I don't know her at all. My ex was horribly abusive to me. I wasn't going to message her what he did to me because I don't want involved. She won't believe me anyways and I blocked him from everything, I even changed my number and it's been 8 months of no contact. She'll figure it out in time what he's about. Is he bad mouthing me? I don't know how she would even know my name to block me. I deleted every pic of us, and there are no traces of my ex on my profile, I keep it very light and positive and you can only see my profile pics. So, I just wonder why she would do that?
What are the possible reasons my ex's new girlfriend blocked me? How would she even know my name to block me?
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