In the Irish language, _Cuinicear_, pronounced "Keenèkar," is a
rabbit-warren. _Cuinin_ is the diminutive of _cu_, a dog of any sort;
and from the Celtic _cu_, the Greeks took their word ~kyôn~, a
dog. I am of opinion that the origin of rabbit is in the Celtic word
_rap_, i. e. a creature that digs and burrows in the ground.