I was going to argue more but I looked into "eight string ukelele" and, Wellah! there is such a thing. So I looked at several of the other links and found a thread discussing this exact instrument along with a fragment of interview with the lady in question about the instrument in question. It would appear that she strings the instrument differently according to the effect she wants.
The site is a mandolin players site.
Two of the posters refer to it as a "Taro Patch" instrument.
http://www.mandolincafe.com/forum/showt ... string-ukeThat's good enough for me...
Having said that, I still wouldn't refer to it simply as a ukelele no more than I would refer to a 12 string guitar simply as a guitar. Once you step up from the simple four strings the uke becomes something else even if it has ukulele in its name.
That's how I see it anyway.