Ñ is pronounced like the ni in onion or the ny in canyon. Ñame is thus pronounced ny-ah-may.
Ñame is a staple Dominican vegetable and the English translation is yam, but it is not a sweet potato as I think yams are. The word is also used to describe someone who is a bit of an idiot! It cannot be said to be an attractive vegetable by any stretch of the imagination being brown and woody looking, and comes in a variety of shapes and sizes. In fact, ñame can become enormous, well over 100lbs, and there are all sorts of reports of monster ñames - here is a chap who is very proud of his.
When you cut it open it is white inside and to cook it you simply peel, cut into chunks and boil until soft.
It is the staple diet in Africa, where 95% of all ñame is grown, and is used in a dish called fufu, which provides 200 calories a day per person. However, because it is low in protein, in areas of high consumption children often suffer from a serious protein deficiency disease. In addition, although not scientifically proved, it is thought to contain a type of oestrogen and so is used as a natural menopausal supplement to reduce hot flushes.
here, from Aunt Clara's Dominican Cookbook.