I found this website on my usual searches through the internet .. ENGLISH COMMON NAMES FOR SOME ORCHIDS
It lists both English Common Names to Latin names and also Latin names to English Common .. so , for example you can find that your Paphiopedilum bellatulum is considered the Egg-in-a-nest orchid or that your Monkey Orchid is a Coryanthes macrantha.
Pretty neat reference site.