Levi’s recently posted an image of the model Adrien Sahores to its Instagram account, with a thin but noticeable tuft of hair joining his brows. “He had a really natural self-confidence that we loved,” said Levi’s global creative director, Chad Hinson.

Like Frida Kahlo, Bert of “Sesame Street” and George Harrison before them, a new generation is embracing the subversive charm of the unibrow. In our overly plucked and supremely groomed world, there’s a rebelliousness to leaving the brow as nature intended. In some cultures, the unibrow — sometimes called a monobrow — is even seen as a sign of good luck, and for men, a signifier of virility and fertility.

Abraham Ortuno, a 29-year-old accessory designer who lives in Paris, flaunts his unibrow, sharing it with his Instagram followers. He goes with the term “platform eyebrows” for the brow as a whole. “I’ve never been embarrassed by them,” Mr. Ortuno said. “The opposite, actually. I don’t get it when someone has designed eyebrows.”

J D Samson, a musician and artist, is another person who refuses to pluck. “I knew one day it would come around,” she said.

In high school, she was named “best eyebrows” by her classmates, which she suspects was a joke. “When I got to college, I fully embraced it,” Ms. Samson said. Her acceptance of her look came about partly because of the encouragement of a friend, the artist K8 Hardy. “She was like: ‘You should just make it your thing and be proud of it. Wear it with pride.’ I’ll never forget that day.”