If nerve consists of many axons, where are then their soma located?
Neurons or nerve cells typically have a dendritic region, an axon and a cell body. The axon is also referred to as a nerve fiber. The axon is typically the longest structure, while the dendrites are mostly situated close to the cell body. See the following figure 1:


Schematic of a nerve cell. Source: Prof. Brown. 

Axons often bundle into nerves. For example, the peripheral nervous system contains many nerves. The cell bodies of the neurons that feed their axons into a nerve are organized into ganglions outside the nerve (Fig. 2).


The peripheral nervous system and the location of the ganglia. Source: Miami College.