The phrase "a legend about" is correct and usable in written English.
It can be used when referring to a story or narrative that is widely told and often involves mythical or historical elements related to a specific subject or person.
Example: "The book recounts a legend about a brave knight who saved the kingdom from a terrible dragon."
Alternatives: "a tale concerning" or "a story regarding".
Very South Italian city, with a legend about finding mermaids swimming in the water.
Jake Halpern investigates a legend about a Nazi train filled with treasure, hidden deep underground.
It repeated as fact a legend about the origin of the name that is both outlandish and insulting.
It's connected to a legend about a hangman's wedding, and locals rub the angel while making a wish.
"Blue Wolf," a legend about a wolf and a doe, was visible on paper but not onstage.
Atahualpa was the last Inca chief, and there is a legend about the gold he left to his protege, Cantuña.
It's a story based on a Buddhist legend about a tribe of monkeys that decide to go on a diet, but find that they simply cannot stay away from bananas.
Carla L. Peterson started out in 2001 with only a few bits of information about her New York forebears – the name of a great-grandfather and a family legend about a "white Haitian".
His new film blends a love affair between a solider (Banlop Lomnoi) and a country boy (Sakda Kaewbuadee) with a Thai legend about a shaman with the power to transform himself into an animal.
When Margaret Atwood was in her twenties, an aunt shared with her a family legend about a possible seventeenth-century forebear: Mary Webster, whose neighbors, in the Puritan town of Hadley, Massachusetts, had accused her of witchcraft.
Heather Donahue, Joshua Leonard and Michael C. Williams star as a filmmaking crew out to document a local legend about a centuries-old witch, said to live deep in the forest, who would kill you as soon as look at you.
