The tithe applotment records for 1835 show two King farms in Sturgan, one held by Hugh and the other by Michael.
http://www.irishgenealogyhub.com/armagh/tithe-applotments/killevy-parish.php#.VvD4nVJ2ug0
Griffiths Valuation for 1864 lists John King’s farm in Sturgan. He had plot 4 which was a farm of a total of around 35 acres. He was also subletting a property on the farm to some lodgers. Nearby on plot 30 was a Hugh King with a 25 acre farm. Judging by the 1901 census, that family was RC though but there might be a connection since Hugh shows up later on part of John’s property. You can use the revaluation records to follow the primary valuation forward right up to 1929. For example in 1881 plot 4 is split between James King who had 4 acres, John who retained 18 and Hugh King who had 11. By 1883, Hugh had been replaced by Sarah, probably his widow but she was gone soon after too. And so on. The last King appears to have left the townland in 1895.
http://apps.proni.gov.uk/Val12B/ImageResult.aspx
Probate abstract:
The Will of Hugh King late of Sturgan County Armagh Farmer deceased who died 15 December 1880 at same place was proved at Armagh by Michael Toal and Patrick King both of Sturgan Farmers the Executors
The will itself is on-line, and mentions wife Sarah, 3 daughters and son Henry.
http://apps.proni.gov.uk/DCAL_PRONI_WillsCalendar_IE/WillsSearch.aspx
Kingsmills Presbyterian church has baptism records from 1842 onward. According to the PRONI website, the only copy is still held by the Minister, so you would need to get in touch with him if you want to search them. It doesn’t say when the marriage records but its probably 1845, when civil registration started. Prior to that you would need to rely on gravestones. If they haven’t been transcribed anywhere, then you might need to employ a researcher to go round the graveyard and take down the details.
As to whether the various Outlacken families are related, it wouldn’t be unusual but since the records don’t go back very far it could be difficult to find out. I notice that several of the families are Church of Ireland so you would need to look at Killevy parish records to trace them back. There were 3 churches within the parish. Camlough has records from 1832, Drumbanagher from 1838 but Killeavey itself has none before 1878 as its earlier records were lost in the 1922 fire.
Some more probate abstracts from the PRONI wills site:
Letters of Administration of the personal estate of William King late of Outlacken County Armagh Farmer who died 8 January 1893 at same place were granted at Armagh to Andrew King of Outlacken Farmer the Brother.
Probate of the Will of Andrew King late of Outlacken County Armagh Farmer who died 5 September 1903 granted at Armagh to Anthony O'Hare Farmer and Edith Taylor (Wife of H. Taylor).
Probate of the Will of Joseph King late of Outlacken County Armagh Farmer who died 21 June 1898 granted at Armagh to James King Farmer.
William died intestate and his probate file was destroyed in the 1922 fire in Dublin. The other 2 wills are on-line.
