Don't know where to start

[gaffy]

Just for information, but it gives you a timeline to work with.
Baptism of Mary A , 11th April 1847 with parents John and Sally, Analoist.

https://registers.nli.ie/registers/vtls000633281?locale=en#page/99/mode/1up

There is also Alice, baptised April 1851

And John, baptised 20 May 1855 for parents John Maguire and Sarah McMahon of Analoist.

https://registers.nli.ie/registers/vtls000633281?locale=en#page/123/mode/1up (near bottom)

[gaffy]

Likely sister of Catherine, Mary Mallaghan of Chapel Lane, married Robert Morrow of Hamill Street in St. Mary's, Belfast, on 30 September 1878, her parents given as Patrick and Susan Mallaghan:

https://registers.nli.ie/registers/vtls000633206?locale=en#page/60/mode/1up (6 entries down)

[mrjmitchell]

Likely sister of Catherine, Mary Mallaghan of Chapel Lane, married Robert Morrow of Hamill Street in St. Mary's, Belfast, on 30 September 1878, her parents given as Patrick and Susan Mallaghan:

https://registers.nli.ie/registers/vtls000633206?locale=en#page/60/mode/1up (6 entries down)

Wonderful finds. Thank you all so much for your help. 

[Neale1961]

Possible death for Patrick Mallaghan in 1874
Occupation – dealer
Daughter Catherine is informant
https://www.irishgenealogy.ie/files/civil/deaths_returns/deaths_1874/020673/7253940.pdf

[gaffy]

When he married in 1876 Thomas Maguire was a widower.
Was his previous marriage in Ireland?      Scotland?     Elsewhere?
I didn’t see any likely marriage in Ireland. 

I had a search through Irish records for Thomas's previous marriage but couldn't find anything which is strange.

(1) Mary Jane Maguire born at 47 (or 117 mistranscribed?) Bentinck Street on 21 September 1874 to Thomas Maguire of 117 Bentinck Street and Jane Mullen:
https://www.irishgenealogy.ie/files/civil/birth_returns/births_1874/03129/2147337.pdf

(2) Death of married labourer's wife Jane Maguire at 72 Bentinck Street on 2 July 1875, which is a match for Thomas' address at the time of his 1876 marriage to Catherine Malligan, Jane Stewart of same address was the informant:
https://www.irishgenealogy.ie/files/civil/deaths_returns/deaths_1875/020616/7233340.pdf

(3) Marriage of Thomas Maguire to Jane Mullen at Aghagallon RC church on 23 May 1871, his address Derryclone townland - again in the vicinity - and his father given as John, a weaver:
https://www.irishgenealogy.ie/files/civil/marriage_returns/marriages_1871/11342/8163468.pdf

https://www.townlands.ie/antrim/massereene-upper/aghagallon/derryclone/

[mrjmitchell]

Amazing work! Thank you

When he married in 1876 Thomas Maguire was a widower.
Was his previous marriage in Ireland?      Scotland?     Elsewhere?
I didn’t see any likely marriage in Ireland. 

I had a search through Irish records for Thomas's previous marriage but couldn't find anything which is strange.

(1) Mary Jane Maguire born at 47 (or 117 mistranscribed?) Bentinck Street on 21 September 1874 to Thomas Maguire of 117 Bentinck Street and Jane Mullen:
https://www.irishgenealogy.ie/files/civil/birth_returns/births_1874/03129/2147337.pdf

(2) Death of married labourer's wife Jane Maguire at 72 Bentinck Street on 2 July 1875, which is a match for Thomas' address at the time of his 1876 marriage to Catherine Malligan, Jane Stewart of same address was the informant:
https://www.irishgenealogy.ie/files/civil/deaths_returns/deaths_1875/020616/7233340.pdf

(3) Marriage of Thomas Maguire to Jane Mullen at Aghagallon RC church on 23 May 1871, his address Derryclone townland - again in the vicinity - and his father given as John, a weaver:
https://www.irishgenealogy.ie/files/civil/marriage_returns/marriages_1871/11342/8163468.pdf

https://www.townlands.ie/antrim/massereene-upper/aghagallon/derryclone/

[gaffy]

This is just a speculative "maybe", so just to note until it can be ruled in or out.

From the Aghagallon RC parish registers, a son Patrick was baptised for a couple called John Maguire and Sarah McMahon on 14 January 1862:
https://registers.nli.ie/registers/vtls000633070#page/171/mode/1up (left page)

I think Patrick may have been a tailender for this couple, I don't see later children.

A 27 year old Patrick Maguire of Drumaleet married Teresa Collins on 10 February 1891, his father recorded as John, a farmer:
https://www.irishgenealogy.ie/files/civil/marriage_returns/marriages_1891/10657/5883175.pdf

https://www.townlands.ie/antrim/massereene-upper/aghagallon/aghagallon/drumaleet/ (again - in the vicinity)

A 60 year old farmer's wife Sarah Maguire died at Drumaleet on 3 December 1879, a John Maguire of Drumaleet was the informant:
https://www.irishgenealogy.ie/files/civil/deaths_returns/deaths_1879/06501/4871958.pdf

Widower John and son Patrick's family at Drumaleet in 1901:
https://www.census.nationalarchives.ie/pages/1901/Antrim/Aghagallon/Drumaleet/1002526/

John died at Drumaleet on 14 March 1908:
https://www.irishgenealogy.ie/files/civil/deaths_returns/deaths_1908/05508/4543628.pdf

The names involved aren't uncommon, so as I said, just a punt to look at for now.

[mrjmitchell]

Has anyone found any information that could tell me the parents of John Maguire & Sarah McMahon. And Patrick Mallaghan/Mulligan? I also believe his wife to be Susan Cosgrove but not confirmed yet. Thanks

[Neale1961]

Patrick Mallaghan’s death suggests he was born about 1814, but without knowing where he was born, it will be difficult to find a birth.
I haven’t yet found a death for his wife Susan.