From: Piotr Gasiorowski
Message: 69373
Date: 2012-04-19
> In fact Med.Lat. has <ratus>, <rattus>, <rato>, andMost likely with word-final degemination (inflected forms are unattested)
> <raturus>. OE has <ræt>,
> and OHG has both <rato> andAnd the geminate is easy to account for via Kluge's Law. Kroonen (2011)
> <ratte>. The oldest attestations are mostly non-geminate.