First recorded by Charles Harrison (US #1 1913).
Other hit versions by Henry Burr (US #2 1913), The Three Suns (US #1 1947), Buddy Clark (US #1 1947), The Harmonicats (US #1 1947), Ted Weems & His Orchestra (US #5 1947).
Also recorded by Dropkick Murphys w/ Bruce Springsteen (2011).
From the wiki: “‘Peg o’ My Heart’ was written by Alfred Bryan and Fred Fisher. The song was inspired by the main character, Peg, in the very successful musical comedy of the time, Peg O’ My Heart, starring Laurette Taylor in the title role. It would be first performed publicly by Irving Kaufman in 1912 at The College Inn in New York City after he had stumbled across a draft of sheet music on a shelf at the Leo Feist publishing offices. ‘Peg o My Heart’ would be featured in the 1913 musical Ziegfeld Follies where it gained wide attention.
“The first recording of ‘Peg o’ My Heart’ was made by Charles Harrison, in July 1913. Henry Burr (‘Are You Lonesome Tonight?‘) followed in August 1913 with his rendition. Both proved to be nationally-popular recordings. ‘Peg o’ My Heart’ saw a resurgence of popularity after WWII with numerous covers jockeying for popularity in 1947, including #1 recordings by The Three Suns, Buddy Clark, and The Harmonicats. In 2011, Celtic punk band Dropkick Murphys would revive the song, with a guest appearance by Bruce Springsteen.”