Two questions for anyone who might answer:
1. What is the origin of the Lithuanian n-stem nom. acc. dual ending -iu (as in s^uniu, akmeniu)? Is it at all related to the Sanskrit ending -au?
2. What is the origin of the Old Norse masculine n-stem nom. sg. ending -i? My first guess is that it might be from an ending *-e: which was an alternative to *-o:. But as *e: became ae: in Germanic, such an ending would more likely show as -a, would it not? So where does this -i come from, especially since everywhere else in the declension of these nouns Old Norse has
-a(-)?
Andrew