Question: What is the real surname of the Louvin Brothers, an American musical duo who recorded the song Tiny Broken Heart in 1956 for their first album 'Tragic Songs of Life'?
Sentence (from "The Louvin Brothers"): 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.
Relevant evidence: Yes