Posted on 14th February 2015 by melyn Kellyn is the Cornish word for duckweed Yes, duckweed in Cornish is kellyn Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Post navigationPrevious post: Dibystik is the Cornish word for unharmedNext post: Presep is the Cornish word for manger