Aperson's name generally has no logical connection with the actual person, just as the word "cow" has no direct connection to any actual cow. these examples illustrate the principle that the connection between a word and what it represents is

I believe the answer is: arbitrary

In human communication,the  sound of a word typically does not gives any hints about its meaning and this meaning would vary depending on the society where you live in.
It could on the other hand, reflected the emotion that felt by the speakers of the word when they are saying them.