Re: Illyrian-Albanian prefix d-

--- In cybalist@yahoogroups.com, "Abdullah Konushevci"
<akonushevci@...> wrote:

>
> So, to conclude: d- + root
>
> *rin- > Illyrian/Albanian river name Drinum
> *ril- > Illyrian/Albanian revers name Drilon, Drilo (cf. also above
> K-ril-evë)
> *rei-wo- > Illyrian/Albanian river name Drivastum (cf. also above
> K-riv-açë)
> *ab- > Illyrian/Albanian Dabanos (cf. also above Dab-anos, Dab-oc,
> Dab-inoc, Dab-koc)
> *roi-na: > Illyrian/Albanian river names Dren-ica, Dren-oc etc.

Any idea what the origin of this d- prefix is? I've long suspected
that PIE had a *d- prefix.