Can you please give a date of birth and the place in Ireland. Do you know what his aunts name was?

I have found a lot of John Joseph's so its hard to see which one might be yours/.

Canada, Soldiers of the First World War, 1914-1918
Name: John Joseph Mcguire
Residence: Somerville, Massachusetts, United States of America
Birth Date: 1 Feb 1882
Birth Location: Cork, Ireland
Relative: Mrs Clara McGuire
Relationship: Wife
Regiment Number: 3081718

I found the above John born Ireland, wife Clara, enlisted in Canada and living in Massachusetts.

The cap and collar badge in your photo look like the maple leaf

They were living in 23 Flronce Street, Somerville, Mass

states he served before: in the 135th Batt. RFA

His occupation is listed as painter

This looks like your John Joseph Mc Guire marriage to Mary Lillian Symon whos father is Frank Grady. If this is the correct marriage and the post above is correct Mary Lillian must have died before he signed up for WW1.

Massachusetts, Town and Vital Records, 1620-1988
Name: John Joseph Mc Guire
Birth Date: abt 1880
Event Type: Marriage
Event City: Bridgewater
Marriage Date: 22 Sep 1908
Marriage Age: 28
Father Name: Francis Mc Guire
Mother Name: Jane Courie
Spouse Name: Mary Lillian Symon
Spouse Marriage Age: 35
Spouse Father Name: Frank Grady
Spouse Mother Name: Mary Honaker

One thing i missed in the above is John's fathers name was Francis and his mother was Jane Courie. so maybe not the correct couple. How/were did you find John's parents bernard mcguire and jane corcoran

his death certificate lists feb 1 1880 as his birth date. yes your note regarding the somerville mass. address is correct . that is him and his wife clara mcvay mcguire is correct. I do not know his aunt's name. I have found what I think is his parents marriage date Nov 1874. His parents Bernard Mcguire and jane corcoran were married in ballaghderreen, county mayo, which became county roscommon in 1898. His brother James married married an Annie Ransom in 1906 in Brockton/bridgewater ma. I know nothing of John's twin brother Tom. I am guessing that he came to the states between 1899 and 1905

his parents were listed on John Josep's death certificate as Bernard Mcguire and Jane Corcoran His death location in Calvary cemetery brockton mass is correct. His daughter Lillian Sabin has confirmed that he was married before clara mcvay. However his first wife Mary Lillian Symon(first marriage) grady died before the birth of John Joseph's and clara mcvay's first child Mary Mcguire who was born in 1915. I have a copy of John and Mary Grady's marriage listing. It has her parents as Patrick Grady and Mary Monahan and John's parents as Bernard McGuire and Jane Corcoran. It was interesting to me that John and Clara first two daughters were a Mary and a Lillian.

I've obtained a death certificate for jane Corcoran McGuire. she died in boston Massachusetts on dec. 8, 1919 from heart disease. the certificate lists her parents as james Corcoran and Elizabeth payton/peyton. any info on the parents is appreciated.

updated info on John McGuire. John's twin was not Thomas who was an older brother (Born 1874. John's twin died shortly after childbirth). John was born Feb 7 1877 in Belanagare Roscommon as was his father Bernard. Acc to Bernard's Marriage certificate his father's name was Patrick and his wife, jean's parents were James Corcoran and Elizabeth Peyton. James and Elizabeth who married Feb 25 1835 in Tibohine Fairymount Roscommon