I am very happy to say that my friend in Thailand received my message and answered.
She tells me this plant has a common name of Peruvian Lily and it a good luck plant.
Botanical name: Eucrosia bicolor Ker Gawl. Amaryllidaceae
Catalog of Life:
http://www.catalogueoflife.org...
http://book.baanlaesuan.com/pl...
This link is in the Thai language but there is an option to translate into English:
http://saimherbal.blogspot.com...
If you copy/paste this word (which I believe translates to "the great")...ว่านมหาลาภ...into a Google Image search, you will see many photos of the plant and flowers.
Another common name is Queen Lily
Hope this information helps.
Edited to add link to Catalog of Life page for this plant.