From: Piotr Gasiorowski
Message: 62083
Date: 2008-12-15
> Another take: There's also an adjective (and a well established pun) Da.A good point. The root is actually something like *kreh1(i)-/*krih1-,
> + Sw. <ren>, No. <rein> "clean" < ON <hreinn> < *xraini-, derived from
> the o-grade of IE *kr-ey- "separate, choose". The animal name could be
> "the chosen", either directly from the adjective or by back-formation
> from the compound <hreindýri>. It might have denoted the animal as an
> object of trade, after how herds were rounded up and animals singled out
> to be sold or slaughtered. Or, noting <-dýri> with a final i as opposed
> to <dýr> "animal", perhaps it originally meant "single animal in the
> herd" at a time when <dýr> was still a collective.
>
> But I'm an amateur and there may well be obvious errors.