Hi Gransfamily,
I'll list what info I have and you can see if its relevant? (I'm afraid I cant give out any details of people who are still living...sorry

)
I have John son of John and Jean Smith born 1797 died 1858 m Agnes Gebbie of Riccarton(?) in 1825
Agnes Gebbie b 5/09/1802 daughter of John Gebbie and Rachel Brown in Loudon
Their children were
John b1826 d 1897 and was an "inspector of the poor"

??
Grizal b 1828
Jean b 1830
Elisabeth b 1832
James b 1836
James b 1836 m Joan Donaldson in 1862
Joan was the daughter of John Donaldson (calico printer) and Mary Campbell
James (b1836) was a shopkeeper (Grocer)
James and Joan had the following children
Mary Campbell Roxburgh b1864 in Dalry Ayr
John b 1866 in Old Monkland Lanark
Agnes Gebbie Roxburgh b 1867 in Old Monkland Lanark
James b1868 in Old Monkland Lanark
Joanna Donaldson Roxburgh b 1872 in Old Monkland Lanark
Jeanie Burns Roxburgh b1874 in New Kilpatrick Dunbarton
Jeanie Burns Roxburgh married Gilbert Hume Paton in 1899 at St Rollox lanark
James Roxburgh b 1868 d1939 married 1) Annie Kenyon Douglas in 1893. They had 1 child James Donaldson Roxburgh b 1895 d 1898. Annie d 1895.
James remarried Jessie Mathilde Lindsay in 1903 (she was b 1869 d 1951)
Their children were
Donald Stuart b 1903 d 1903
Jeanie b 1904
Allan b 1905
John b 1906
Malcolm b 1907 - 1932 Killed in car accident
Joan b 1909 -1965
Gavin b 1910-1986
Colin b 1914 d 198?
This is the line I am descended from.
A little other info I have is
John Roxburgh b 17.1.1827 d 20.3.1880 Inspector of Poor
married Mary Young and their children were
Hugh G. Roxburgh
Agnes G. Roxburgh b 14/12/1879 d 25/12/1925
Catherine Y Roxburgh
Hope that helps
AH