In Vaudeville, Jerry, Hele, Josephine & George M. were "The Four" these
Suddenly, the Four Cohans 
were a Big Time act, with George eclipsing Jerry .... About these ads... [DOC] [TLE] George M. Cohan Biography - Part I - Musicals101.com [PAR] George M. Cohan at the age of 10, with the violin that he considered to be a 
major ... child of Jeremiah and Helen Costigan Cohan, better known as Jerry and 
Nellie.