I don't know how these laws work, but she's been using that name for over 20 years. Long before that band was even around.
"Barely a day later, another blind spot made itself known: Anita White, a blues singer and Black woman, had been using the stage name Lady A for over 20 years. “This is my life,”
she said."
According to
her website, White has been performing blues, soul and funk in the Pacific Northwest for two decades and released her debut recording in 2010. A new album, “Lady A: Live in New Orleans,” is scheduled for release on July 18, her 62nd birthday.
“They’re using the name because of a Black Lives Matter incident that, for them, is just a moment in time,” White
told Rolling Stone upon hearing about Lady Antebellum’s name change. “If it mattered, it would have mattered to them before. It shouldn’t have taken George Floyd to die for them to realize that their name had a slave reference to it.”
Lady Antebellum Sues the Singer Lady A Over Name Change