I mentioned my recent transformation of "Hardiman the Fiddler" to my friend Tim at our session last night. He told me that in Quebec there is a family of tunes called "Brandy"s that are in 6/4. I looked them up just now and it seems that one hypothesis is that they came from a transformation of the Irish slip jig "Drops of Brandy".
 
Here's a quote
"The case of the brandy is a bit different. This name designates a dance which is widespread throughout the province. In several regions of Quebec, the dance is done to an ordinary reel, although some musicians still use an archaic melody in ternary scale, a melody which is only used to accompany this dance. In the Saguenay - Lac St.-Jean region, where this dance is still popular, the ordering of this dance is done with complex step-dances, from which the name of brandy frottÈ, as it is known there. Sources lead us to believe that our brandy is derived from a popular tune in the British Isles known as Drops of Brandy, whose melody is also in 9\8 time, or ternary scale. Although the melody of origin and the Quebec version show few similarities to this tune, it might be the case of a structural transformation, and the question remains... "
 

The article in this link has even more info and a transcription of one version of the "Brandy"  cfmb.icaap.org/content/24.1/BV24-1art2.pdf

So, not surprisingly, I'm not the first to try this stuff,