Most popular to least. Comments welcome. Feel free to do more surveys (though if you want them to be tallied, do beyond what I’ve tallied).
Darcy: 29 votes
Dalton: 16 votes
Davey and Douglas: 12 votes each
Digby: 10 votes
Davenport, Denholm, and Desiderio: 8 votes each
Dalziel and Dunstan: 7 votes each
Denzel, Dixon, and Dougal: 6 votes each
Dutch: 4 votes
Dudley: 1 vote