Elma Amy Yerburgh was a member of the Thwaites family who was owner and then chairman of the Thwaites Brewery company from 1888 to 1946. She was the daughter of Daniel Thwaites, M.P. for Blackburn, and was married to Robert Yerburgh, M.P. for Chester. In the town of Blackburn she was known for her generosity to the company's workers and as a public benefactor, who helped fund the construction of the War Memorial wing to Blackburn Royal Infirmary and helped found the town's Empire Theatre, now named after her. Her name was also commemorated in "Elma's Pound", a beer specially brewed by Thwaites Brewery for Christmas 2007 to celebrate their 200th anniversary.

Thwaites Brewery is a regional brewery founded in 1807 by Daniel Thwaites in Blackburn, Lancashire, England, now located near Mellor in the Ribble Valley. Part of the company was sold to Marston's in 2015, and the original brewery was demolished in 2019. Thwaites still produces beer on a smaller scale.