. Carey tentatively takes this from *com-ronn 'shared bond, link',
Ériu lii 70
. Ronn is frequently depicted as a chain binding two creatures together and may be metaphorically applied to Colum Cille and the youth of Carn Eolairg in the following: óro bátar isin chobrunn 'they were conversing (?)'
Ériu lii 60.24
; see comrann.