These are just names, LLaMA originally meant ( Large language model Meta AI), but it appears that its also the name of South American animal, thus creative people of internet who download those weights, fine-tuned it and published it with the other animals of same family like alpaca, vicuna, dalai (llama) etc.

There are more important information in these model names, which are suffix, like parameter counts13B, quantization methods GGUF/GGML, fine-tuning techniques like LoRA, fine-tuning parameters like Q6_K_M etc are used.