Seeking any information on the following:

*Source Information: 1850 Fed Census Brookline, Norfolk Co., MA on Sept 9, 1850

53 74 DONNELL, Anthony 27 Painter New Brunswick, Canada
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59 79 DONNELL, Mary 26 New Brunswick, Canada
59 79 DONNELL, Ellen M 1 MA
59 79 DONNELL, Andrew 20 New Brunswick, Canada
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*Source Information: 1860 US Fed Census, Charlestown, Middlesex Co., MA on July 20, 1860 by TW Willard

2714 3576 DONALD, Andrew 30 Painter St. John's New Brunswick, Canada
2714 3576 DONALD, Mary 30 St. John's New Brunswick, Canada
2714 3576 DONALD, Ellen M 11 MA
2714 3576 DONALD, Jas 9 MA
2714 3576 DONALD, Alonzo H 6 MA
2714 3576 DONALD, John 3 MA
2714 3576 DONALD, Wm 8/12 MA
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*Source Information: 1880 Fed Census, Boston, Suffolk Co., MA on Jun 4, 1880 by Authur Mechan
STEVENS, James H. Self Married Male W 40 MA Laborer MA MA
STEVENS, Ellen M. Wife Married Female W 32 MA Keeping House NEW B. NEW B.
STEVENS, Augustus H. Son Single Male W 13 MA Cash Boy MA MA
STEVENS, Lillian L. Dau Single Female W 10 MA At School MA MA
STEVENS, Warren C. Son Single Male W 7 MA At School MA MA
STEVENS, George F. A. Son Single Male W 4 MA MA MA
STEVENS, William W. Son Single Male W 1 MA MA MA
DONNELL Mary MotherL Widow Female W 54 NEW Brunswick NB NB
DONNELL James A. BroL Single Male W 28 MA Wood Carver NB NB
DONNELL Alonzo H. BroL Single Male W 26 MA Laborer NB NB
DONNELL John A. BroL Single Male W 22 MA Laborer NB NB
DONNELL William H. BroL Single Male W 20 MA Laborer NB NB
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Trying to find names of Andrew's parents as well as Mary's last name and names of her parents.

According to one census, Mary's parents were born in England and according to another they were born in New Brunswick.

Andrew's parents may have been born in Ireland.

Variations: O'DONNELL, DONALD, McDONNELL, McDONALD.

Mary and Andrew immigrated to the US in 1843.

Andrew probably served in the American Civil War:
*Source Information: American Civil War Soldiers Record
Name: Andrew DONNELL ,  
Residence: St John, New Brunswick
Occupation: Painter
Enlistment Date: 26 August 1862
Distinguished Service: DISTINGUISHED SERVICE
Side Served: Union State Served: Massachusetts
Unit Numbers: 931 931
Service Record: Enlisted as a Private on 26 August 1862 at the age of 31
Enlisted in Company U, 29th Infantry Regiment Massachusetts on 26 August 1862.
Arrested Company U, 29th Infantry Regiment Massachusetts on 17 September 1862 in Boston, MA
Received on 06 December 1862 at Forrest Hall Prison, DC

Thanks for any insight you may be able to provide.
JC Henry