The difference between Anonymous and Unnamed

When used as adjectives, anonymous means lacking a name, whereas unnamed means not having a name.

check bellow for the other definitions of Anonymous and Unnamed

Anonymous as an adjective (not comparable):

Lacking a name; not named, for example an animal not assigned to any species.
Anonymous as an adjective (not comparable):

Without any name acknowledged of a person responsible

Examples:

"an anonymous pamphlet; an anonymous subscription."

"'anonymous author"
Anonymous as an adjective (not comparable):

Of unknown name; whose name is withheld

Examples:

"an anonymous author; an anonymous benefactor."

"The anonymous contributors of Wikipedia"

"No customer personal data will be retained unless it is rendered anonymous''."
Anonymous as an adjective (comparable, figurative):

Lacking individuality.

Examples:

"an anonymous office block in a soulless industrial estate"