Refers to traditional stories, myths, or folklore passed down through generations.
He is called a legend of the soccer world.
An old legend remains in this village.
legend (on a map); usage guide
Used for explanatory keys on maps, charts, or diagrams.
Check the symbols by looking at the map legend.
living legend; icon
Describes a person who is extremely famous and admired, often in sports, music, or other fields.
He is a legend in the baseball world.
I checked the map's legend before setting off.
She became a legend in this field.
That was a legendary-level play.
アイコン usually means a small graphical icon (as on a computer screen), while レジェンド in its 'icon' sense refers to a famous, admired person, not an image.
Borrowed from English 'legend'.