Final answer:
Schwann cells are the cells that myelinate only one axon each, with multiple cells per axon.
Step-by-step explanation:
The cells that myelinate only one axon each, with multiple cells per axon, are Schwann cells. Schwann cells are a type of glial cell found in the peripheral nervous system (PNS) and they play a crucial role in insulating peripheral axons with myelin. Each Schwann cell wraps around a portion of only one axon segment, providing insulation and support.