Leahy is the name of a Canadian folk music group. The eight band members, all from the Leahy family of eleven siblings, are from Lakefield, Ontario and have been actively touring Canada and internationally since the early 1980s when they were known as The Leahy Family. In 1985, they were the subject of a short film entitled Leahy: Music Most of All which received an Academy Award in the category of "Best Foreign Student Film".

The line-up of the group varies depending upon the availability of its members who come and go due to marriage, raising children, and other commitments. During the 1980s and early 1990s, the band recorded a number of privately-released LPs and cassettes (most of which used the same title, The Leahy Family) which were sold at their concerts and they were frequent guests at the Big Valley Jamboree concerts in Saskatchewan and Alberta.

In 1997 the band resumed recording with their "relaunch" album, Leahy which also introduced the group's new branding. Leahy was an instrumental album, but the band also includes vocal performances in their live performances and subsequent albums have included both vocals and instrumentals.

Natalie MacMaster, CM (born June 13, 1972) is an award-winning fiddler from the rural community of Troy in Inverness County, Nova Scotia, Canada who plays Cape Breton fiddle music.

MacMaster has toured with the Chieftains, Faith Hill, Carlos Santana and Alison Krauss, and has recorded with Yo-Yo Ma. She has appeared at the Celtic Colours festival in Cape Breton, Celtic Connections in Scotland, and MerleFest in the United States.

MacMaster is the daughter of Alex and Minnie (Beaton) MacMaster, and the niece of Cape Breton fiddler Buddy MacMaster. She is the sister of Kevin and David MacMaster. She is the cousin of two other Cape Breton fiddlers, Ashley MacIsaac and Andrea Beaton. She was born on June 13, 1972. In 2002, she married fiddler Donnell Leahy of the Leahy family band, and moved to Lakefield, Ontario. In 2011 she moved to Douro, where she built a new house. In December 2005, she gave birth to a daughter, Mary Frances Rose. Her second child, a son, Michael Joseph Alexander, was born in June 2007. In 2007, MacMaster learned she was related to Jack White. Her third child, a daughter, Clare Marie, was born in February 2009. Her fourth child, another daughter, Julia Elizabeth, was born in January 2011.