Griffiths Valuation for 1862 lists what may be Daniel Owens in Grange of Nilteen. He had plot 2c which was a small hosue and garden. Today that’s on the Burn Rd, in the village of Parkgate, just outside Antrim town.
If Daniel Owens was described as a pensioner in 1850,then that indicates he was retired from the army or navy. You could look for service records for him, if interested, on findmypast or Ancestry.
There’s a death that might be Daniel, registered on 19.5.1873, aged 85, in Antrim town. You can view the original certificates on-line on the GRONI website, using the “search registrations” option:
https://geni.nidirect.gov.uk
You will need to open an account and buy some credits. It costs £2.50 (sterling) to a view a certificate.
Griffiths lists a Hugh Henry in Town-head, Townparks, Antrim in 1862. He had plot 62 which was a house and small garden. Given that Mary Ann’s father was a farmer, I am not certain that this is the right person since he doesn’t appear to have any land. There was another Hugh Henry a few miles away in Farlough just outside Randalstown. He farmed plot 9, so he might be her father.
Probate abstract:
The Will of Hugh Henry late of Farlough County Antrim Farmer and Grocer deceased who died 17 June 1877 at same place was proved at Belfast by the oath of Richard Drain of Lenagh (Antrim) same County Farmer the surviving Executor.
His wife’s probate abstract:
Letters of Administration of the personal estate of Mary Henry late of Farlough County Antrim Widow deceased who died 5 June 1877 at same place were granted at Belfast to Richard Drain of Lenagh (Randalstown) same County Farmer the Brother of said deceased.