"Ireland Must Be Heaven, for My Mother Came from There" is a popular song with music by Fred Fisher and lyrics by Joseph McCarthy and Howard Johnson, published in 1916.
A version of the song recorded by Charles W. Harrison in 1916 is considered to have been a #1 hit in its day.
The song was also popular in Britain in 1916.
References
Ireland Must Be Heaven, for My Mother Came from There Wikipedia(Text) CC BY-SA