Owners usually pick their dog's Call Name and the dogs usually adjust pretty quickly to the new name. For the dog's Registered Names some breeders use themes, some go alphabetically with their litters, some just let the owners pick. I own two of Robyn's dogs, 1 from her "Time" litter, DC Sherwood's In The Nick of Time SC, RN, LCM and 1 from her "Moon" litter, DC Sherwood's Shadow of the Moon SC, FCH, JOR. Nicky picked his name and I kept his call name when he came to live with me. With Rally I picked her registered name and her call name but didn't make them match. With our co-bred litter, I chose a theme of Magic though I didn't require the word magic in any of the names. The pups are Kinetic Sourcery JC, Ch Kinetic's Enchanted Knight JC, Kinetic Heart of Lucky Magic JC, and Kinetic's Pharoah's Magician. By using a theme a breeder always knows just by the name which litter a pup is from.