> Although Zoega lists <kné> as m(asculine), I think this
> must be a misprint, because Cleasby/Vigfusson lists it as
> n(euter), and Gordon (An Introduction to Old Norse) uses
> it as a paradigm for a stong declension a-stem neuter
> noun, giving <kné> as the accusative plural form.

Yep; Zoëga aside, there seems to be unanimous agreement, and
PGmc. *knewą ‘knee’ was apparently a neuter a-stem, as were
the Old English, Old Frisian, Old Saxon, and Old High German
reflexes.

Brian