Added "Devanagari", which I think may be even more common that "Devnagri".
Hmm, so sayeth Google: Circa 21,100 for "Devanagari", 11,500 for "Devnagri". Do we want to rename the page while it's still easy to do it?
(Not 195.186.255.xxx talking ->) I don't know what Wikipedia convention on these things is or should be. I seem to see a lot of people quoting Google searches as a guideline. Cheers. :-)