I was going to guess C. peruvianus but, as you say, who knows for sure until it blooms. I like it! I had to prop it a bit since it was so top heavy so that's why it's down in the pot like that. Now that it is well-rooted, I can move it to higher ground come Spring.
Crinums do very well here as long as they are ones that are not too sensitive to cold. I have a number of them. I only have one that I think is a pure white one so I would very much like to try yours. Would need to wait about six weeks to mail it though. The groundhog says winter will be over by then.
If I can send you anything, please let me know.