How do you remember their name being spelled. I would have bet all the money in the world it was BerenstEin. I need to dig up my old books and see for myself that it has been BerenstAin all along. My mind was blow reading about this on the internet today.
http://www.avclub.com/article/how-you-spell-berenstain-bears-could-be-proof-para-223615
http://www.avclub.com/article/how-you-spell-berenstain-bears-could-be-proof-para-223615