John Collins was a son of John Collins and Catherine Young
Margaret O'Hea was a daughter of James O'Hea and Margaret Driscoll

John Collins and Margaret O'Hea married in 1885 - 1886 but the record is not to hand.

Children born in Inchingerig, Drimoleague (birth dates from State Register)

Patrick Collins, 26 Jan 1887

Kate Collins, 26 Sep 1888

Jeremiah Collins, aged 10 in Census 1901

Hanora Collins, 13 Nov 1892

John Collins, 15 Apr 1895

Daniel Collins, 24 Jan 1897

Denis Collins, 17 Sep 1898

Cornelius Collins, 27 March 1901

Thomas Collins, 29 April 1902

Michael Collins, 1 Sep 1903

William Collins, 28 Oct 1904

Timothy Collins, 3 Jul 1906

Stephen Collins, 9 Dec 1907

Joseph Collins, 4 Aug 1909

Margaret Collins, 11 Feb 1911

Census 1901:
http://www.census.nationalarchives.ie/pages/1901/Cork/Gurtnascreeny/Inchingerig/1154351/

Census 1911:
http://www.census.nationalarchives.ie/pages/1911/Cork/Gortnascreeny/Inchingerig/440530/

Deaths:

John Collins died at Inchingerig on 23 January 1933.  From his death record he was married, aged 72 years, a farmer and his son, Cornelius Collins was the Informant of the death to the Registrar.
Death announcement on The Cork Examiner of Wednesday January 25, 1933:
COLLINS (Drimoleague) - On January 23, 1933, at his residence, John Collins, Inchingerig.  Deeply regretted.  R.I.P.  Funeral on to-day (Wednesday) from Saint Finbarr's Church, Drimoleague to adjoining cemetery at 2 o'clock.

Margaret Collins died at Inchingering on 8 August 1957.  From her death record she was a widow, aged 90 years, an old age pernsioner.  Her son Cornelius Collins was present at her death and the Informant.
Death announcement on Cork Examiner of Saturday, August 10, 1957:
COLLINS (Drimoleague) - On August 8, 1957, at her son's residence, Inchangerig, Margaret Collins, relict of John Collins.  Deeply regretted. R.I.P.  Funeral on to-day (Saturday) at 2 o'clock from All Saints' Church, Drimoleague to adjoining cemetery.