Barbara Lund of OH sent seeds ofYellow Brandywine to Craig LeHoullier in 1991. She told Craig she received the variety from Charles Knoy of IN. Craig enjoyed the tomato so much he sent seeds to Rob Johnson, owner of Johnny’s Select Seeds. They grew it out and made it available commercially.
No one knows how or where it came from before this. There is no mention in old seed catalogs of a yellow Brandywine so in all probability it is not related to the Red Brandwine.