I have 9 hens and a rooster. They all have names, ranging from fluff(named by niece) to Vickie. My rule of thumb is if I am going to personally butcher and consume an animal, I don't name it. Dispatching my furry and feathered friends is hard enough emotionally, so I skip names on food animals to make it easier on myself. For example, the meat birds I get this year will not be named. I will name my breeder rabbits, but not the offspring they produce for food.
Their names are Pumpkin, Squirley, Poppy, Merida, Rosy, and Zippy. They are all also different breeds except for Rosy and Merida, (both Rhode island reds,) but they have unique personalities and looks so we can tell them apart. I don't really have any superstitions though, except the name Willow. We've had a hen and cat named willow and both died, the chicken of vent prolapse and the cat by getting into wasp poisoning. I also wouldn't want to re-use a name.