well, since I didn't have the luxory/pleasure/displeasure of riding with your during my bumrush of LGC3 (5th-9th) the only "Double-D" I know is DonDenver (I have a habit of truncating a person's name and creating my own nickname for said person, thus DonDenver became Double-D by the end of our slope time together).

similarly, I became Dook, Dookster, Dookmeister, and innumerous other permutations of Dookey by the end of the trip (funny how nobody ever really glommed on to my birth name, but then again I told 'em all it didn't matter much to me what I was referred to as...go figure!)