I think the name of this rose is 'Showman', can we update that? Citation: 'The Random House Guide to Roses', Roger Phillips & Martyn Rix (1988), pg. 159: "Showman (Martjo) A Hybrid Tea raised by Mattock in 1983."
We have 'Showman' as a hidden name. It seems that in publications the name changed to 'Snowman' sometime between 1989 and 1993. 'Snowman' sound right for a white rose, but we could be wrong. We will address Mr. Mattock to clarify