What is the word for a person's name when that name has been derived from the name of a place/animal/thing? For example, one of the characters in the story "Hands" (by Sherwood Anderson) is named 'Wing'; the name having been given to him after the wing of a bird. In this case, is there a word to define what type of a name 'Wing' is (something-nym maybe)?

The Romans used placenames as cognomen - e.g. Scipio Africanus, Marcius Coriolanus.
I didn't know until a coupledays agothe latter was awared for Marcius' outstanding valor
in capture of Corioli..