This Scandinavian name is rendered as _rahnualtr_ (eg., in Ed
Runestone,
http://w1.859.telia.com/~u85906673/asar/ed.html) in some
runic inscriptions, which looks as pointing to _Ragnvalðr_. On the
other hand, I have second-hand information that the name is presented
as Old Icelandic _Rögnvalðr_ in critical editions of some sagas.
Where is the truth? Or I'm just missing something?
The question, among other things, is important to me, because Old
Russian _Rog(U)volodU_ (a name of a prince of Polotsk) is easily
explainable as a borrowing from _Ragnvalðr_, but not-so-easily from
Rögnvalðr.
With hope,
Sergei