Hmmm... that's a poser, let me see if I can figure it out...
Apparently 'David' is Hebrew for 'beloved', although I'm only 1% Jewish (I'll let you guys figure that one out, but I will tell you that at 1% I'm probably bragging), and 'Bailey' comes from the same root as 'bail' and 'bailiff', and the 'bailey' was a large walled compound that was part of a 'motte and bailey' style fortification. Perhaps I had ancient relatives who were bailiffs, or, far more likely, they were constantly posting bail.