Is There a Connection Between Our Relationship With Family And Narcissists?

During my own childhood my older brother was consistently being so verbally and physically abusive towards me. It was like he despised me. The Narcissist and my brother caused the same name feeling inside me except with the Narc I was more disconnected. Their disgust and anger was was aimed at me regularly so the neuropathways for dysfunctional communication with the Narc were already lit up brightly due to how my older brother communicated with me.
I forgive my brother because we don’t see each other much anymore and there is no point being bitter as it drains my energy. When we do have interactions, it’s better than when we were kids.