The Louvin Brothers were an American musical duo composed of brothers Ira Lonnie Loudermilk (1924–1965) and Charlie Elzer Loudermilk (1927–2011), better known as Ira and Charlie Louvin. The brothers are cousins to John D. Loudermilk, a Nashville Songwriters Hall of Fame member.
They weren't the first artists inducted in the hall of fame in their family
The cousin was before them, so they can't be the first