Reconstruction talk:Proto-Celtic/aiwestom

I'm not seeing this reconstruction in Matasović. He reconstructs both *ay-sso- and *ay-to- but doesn't attempt to combine them into a singular form. Are there other sources used to reconstruct *aiwestom and, if so, what are they? And how to they explain two completely separate developments in Brythonic? Linguoboy (talk) 19:50, 9 December 2020 (UTC)