I have to wonder what you were "on", KC! Not that I haven't had similar revelations...
The "o" thing with Fenario and "Green Grow...) is to me one of the most irritating lyric devices found in some folk songs. For instance, I have a real problem with songs about Californi-O.
Speaking of the "o" thing - this was one of the main things which put me off from singing Madrigals. ex.: "Just as the tide was flo-o-o-o-o-o-o-o-o-o-o-o--o-o-owing"
Good grief!