Wow that is pretty intense Robert. I had a lady contact me who is trying to find her ancestry. She claims that her gradnmother is an illegitimate daughter of one of my Dad's uncles. My Dad's sister is the geneaology specialist in our family but doesn't want to seem to help this lady. Its complicated I guess. Anyways, this is big news for you. A half brother is certainly an interestng person to discover this late in your life.