Daniel Dennehy was a son of Michael Dennehy and Margaret Sheehan of Ballyshanedehey, Kilmallock, Co. Limerick
Julia Hayes was a daughter of Timothy Hayes and Mary Leary of Reenogrena, Glandore, Co. Cork

Julia Hayes aged 19 sailed on the S.S. Canada in September 1899 to the US and gave her sister, Nellie Hayes in Dorchester, Massachusetts, as the relative she was going to stay with.

Daniel Dennehy (27) of Cohasset and Julia Hayes (22) of Hingham married in Hingham, Massachusetts on 19 November 1902.    View here

Children born in Hingham on dates shown:

John Walter Dennehy, 12 Sep 1903

Daniel Francis Dennehy, 28 Sep 1907

Mary Theresa Dennehy, 10 Feb 1909

Joseph Dennehy, 11 Mar 1911.  Joseph married Cecelia Wilson. Joseph died 8 May 2004

Alice M Dennehy, 13 May 1913.  Alice died at Hingham on 18 June 2007

Charles Dennehy, 22 Aug 1916.  Charles (Charlie) Dennehy, aged 97, died at Shreveport, LA on 16 March 2014

Census 1910:  (note transcription error for Daniel as David)
https://www.familysearch.org/ark:/61903/1:1:M2K8-1P4

Census 1920:
https://www.familysearch.org/ark:/61903/1:1:MFMQ-GK9

Census 1930:
 

Census 1940:
https://www.familysearch.org/ark:/61903/1:1:K4NL-LXY