Thanks Anthony, as it was found here originally and there's people who have passed on what they know through generations in the business I would say it's a fair bet. Breeders of these rarer bulbs are sure to share their knowledge worldwide too! There's some people in the business here who are very savvy.
A named 'cultivar' has a capital letter as they use on daffseek, but this is not a cultivar, it's a variety of the species.