Sometimes it can end up being an elimination game

I am wondering whether this marriage may relate to the Jane Keith born in Lanark:
Hugh Gray and Jane Keith m. 04 NOV 1859 in Lanark, Lanark
Children showing to them on IGI:
1. ALEXANDER KEITH GRAY Birth: 25 MAR 1860 Lanark, Lanark
2. ELIZABETH GRAY Birth: 14 FEB 1862 New Monkland, Lanark
3. DAVID GRAY Birth: 09 MAY 1864 New Monkland, Lanark
4. HUGH GRAY Birth: 14 JUL 1866 New Monkland, Lanark
5. JANE GRAY Birth: 01 APR 1870 New Monkland, Lanark
I can see the family in the 1861/71 census, Jane's age varies from an 1838-40 birth year. She shows as born in Lanark.
Just a note, if you are certain of the Lanarkshire birth for Jane, there are 6 entries coming up in the 1851 census for a Jane Keith born in Lanarkshire between 1833-39, including the Jane we have above.
Monica