Mentioned in 2 Dunboe Baps as father of 3 children with address given as Letterlone for 1866 birth. This man must be a brother of my James McKeown: James' father is called John, both come from Letterlone, this John has a son Daniel and a Daniel witnessed Anna Bella McKeown's marriage. Conclusively, a John, son was PAD at John McKeown's death in 1891.
It also looks like he and his sister married a brother and sister. His wedding cert (where he is called John McCown) found in Coleraine Local Record Office, confirms he is a brother of my James as his father is called John "Macown" from Letterlone. Witnessed by John Dooey and Marey Dooey.
There are NO McKeowns in Letterloan in the Griffiths Valuation. However, a house called 1d, and then 1Ad, has the following tenants in the Griffiths Valuation Revision Books for Letterloan: Thomas Dooey becomes Widow Dooey in 1881, James Campbell in 1886 and John McKeown in 1889. It then becomes John McKeown Jnr in 1892, by which time there are two more houses under 1d, the third one belonging to another John McKeown which becomes Mrs John McKeown in 1892. In the meantime, a John McKeown replaced Henry Hart in House 2c in 1885 and then is himself replaced by a John Hall in 1893. House 1Ad moves from John McKeown Jnr to Martha McKeown in 1906, while the third house, now designated House 1Ac, moves from Mrs John McKeown to Mrs Mary McKeown in the same year. It is in ruins by 1909 but Martha continues to live in 1Ad up until the GVRBs cease in 1927. This suggests that this John was John McKeown Jnr, married to Martha and in House 1Ad from circa 1892.