One of the premier English folk groups of the early 21st century, the Unthanks -- the surname of siblings Rachel and Becky -- present a dynamic mix of old and new, trafficking in elements of traditional Northumbrian folk music, classical, jazz, and pop. The band emerged in 2004 under the name Rachel Unthank & the Winterset and released a pair of well-received albums (2005's Cruel Sister and 2007's The Bairns) before officially adopting the Unthanks moniker in 2009. Since then, the core trio of Rachel, Becky, and the former's husband, Adrian McNally -- who is also the group's m...