Posted reply too quick. Here's the family:
John Woodburn, living in Moyletragh 1796. Children: John, Robert, Margaret, ALEXANDER (1), Susanna.
ALEXANDER (1) WOODBURN, farmer at Moyletraghtoy, m. Margaret. Children:
1. Robert.
2. John.
3. James.
4. Elizabeth Ann "Bettey Ann".
5. Mary m.(15 Oct.1852 1st Garvagh Presbyterian Church) Robert Pollock, weaver, Ballinameen.
6. Margaret.
7. Alexander, farmer, m.(24 June 1851 1st Garvagh Presbyterian Church) Elizabeth (Morrison) Knox?.
8. NANCY (born c1833) m.(29 Aug.1854 1st Garvagh Presbyterian Church) David Caskey, servant, Moyletraghtoy.
9. George, farmer, m.(18 June 1857 1st Garvagh Presbyterian Church) Margaret Bolton.
Children of David and Nancy CASKEY of Killyvalley baptised 1st Garvagh Presbyterian Church:
1. Alexander bapt. 8 Feb.1859 (there's a large gap in the register before this).
2. David bapt.1? Jan.1863.
3. Ellen bapt. 6 Jan.1865 (suspect date is slightly off according to birth below).
IGI lists 4 of the children:
Ellen born 14 Jan.1865 Garvagh district.
John born 16 Oct.1869 Co. Londonderry.
Robert James born 25 July 1872 Co. Londonderry.
Thomas born 5 Jan.1876 Coleraine district.
Can't remember the details at the moment but think the Caskeys did move into or near Coleraine at some point (probably before Thomas' birth in 1876).