William MARSHALL Margaret AULD of Torphichen

[Kiwicol]

William Marshall and Margaret Auld married 24 March 1816 at Torphichen, they had at least 2 daughters, Margaret about 1821 and Janet about 1829. Margaret married William Wilson 1852 at Slamannan, Janet married James Sim Lamont 1848 at Polmont, hoping that there may be more siblings out there.
1841 census what looks to be the right Margaret Marshall was at East Redburn Torphichen, with Helen Marshall aged 10 and Elizabeth Young aged 25.
1851 Margaret Marshall was at School Hose, Torphichen, with John and Marion Arthur they were both 26.
1861 she is with the Lamonts at Polmont.
The 1862 death certificate gives Andrew Auld, a joiner as her father and Margaret Shaw her mother, the informant is her daughter Janet Marshall.
Curiously Janet Lamont's death certificate gives her parents as William Marshall and Margaret Orr, and some of my other Auld's have Orr as a middle name.
Hoping some one has uncovered more about these Marshalls