Your post says James Coyle's spouse was Jane Johnston, but the marriage certificate gives the surname as Thompson. Is there some confusion?
https://civilrecords.irishgenealogy.ie/churchrecords/images/marriage_returns/marriages_1856/09513/5448095.pdf
The family farmed in Anaghgrane (Aghnagrane) townland. James is listed there in Griffiths 1862. No sign of his father Philip so I would say he had died before that year. 2 of James' children’s births:
https://civilrecords.irishgenealogy.ie/churchrecords/images/birth_retur…
https://civilrecords.irishgenealogy.ie/churchrecords/images/birth_returns/births_1868/03452/2267405.pdf
The Valuation revision records on the PRONI site show James farming plot 11 in the townland. That was a house and just over 1 acre. The tenant changes to Jane in 1880 and then to Annabella in 1907. Her name remains as tenant up to 1929 when those records stop. (I think she had moved to Belfast by 1901 but she evidently inherited the lease).
James death in 1880:
https://civilrecords.irishgenealogy.ie/churchrecords/images/deaths_returns/deaths_1880/06486/4866522.pdf
Household in 1901 census:
http://www.census.nationalarchives.ie/pages/1901/Fermanagh/Cross/Aghnag…
Jane’s death in 1909:
https://civilrecords.irishgenealogy.ie/churchrecords/images/deaths_returns/deaths_1909/05468/4530547.pdf
The property today is in some farmland off the Trasna Rd. Looking at it on a satellite image the house is gone and the land just farmland.
Is this Robert’s marriage in 1896? Looks as though he was in the RIC so there’s probably career information available for him:
https://civilrecords.irishgenealogy.ie/churchrecords/images/marriage_returns/marriages_1896/10480/5817145.pdf
Robert died in Co Donegal in 1899:
https://civilrecords.irishgenealogy.ie/churchrecords/images/deaths_retu…
Sarah remarries in 1905 in Belfast:
https://civilrecords.irishgenealogy.ie/churchrecords/images/marriage_returns/marriages_1905/10164/5697601.pdf
Matilda Coyle looks to have married James Hastie in Wishaw, Lanarkshire on 17.10.1910. A Robert Coyle was a witness. Who he? Likely death for Matilda in Wishaw 1950 aged 79. Matilda looks to be in the 1911 census for Cambusnethan aged 33, along with James Hastie aged 41. James may have died in the same area in 1912 aged 44. (You can view all those certificates on Scotlandspeople for a small fee).
Annabella in the 1901 & 1911 censuses:
http://www.census.nationalarchives.ie/pages/1901/Down/Pottinger/Bog_Roa…
http://www.census.nationalarchives.ie/pages/1911/Down/Pottinger__part_o…
Possible death for Annabella Coyle in Belfast on 31.5.1932 aged 74. You can view that death cert on the GRONI site for £2.50 (sterling). She looks to be buried in Dundonald Cemetery in grave D2 268.
Possibly Eliza in 1901:
http://www.census.nationalarchives.ie/pages/1901/Down/Pottinger/Bog_Roa…