Are Leana Silver and "Teenage Topanga" the same people??

My friend told me that she and her boyfriend, Jimmy Sullivan (or more commonly known as The Rev[erand Tholomew Plague] of Avenged Sevenfold), had on the internet. At the time I didn't believe it, but as I was looking at some pictures of her I saw someone had mistaken her as the "Teenage Topanga" girl. I looked into it and it seems like a lot of people think they're the same girl.