Here is my contribution but it’s all conjecture.
This is from the IGI
Name Robert Nicol
Spouse: Agnes Irvine
Event Date: 21 Aug 1815, Abbotshall, Fife, Scotland
Name Elisabeth Nichol
Gender Female
Birth: 03 Nov 1816, ABBOTSHALL, FIFE, SCOTLAND
Father: Robert Nichol
Mother: Agnes Irving
Is this the above Elizabeth with most of her siblings.
Bear in mind the 1841 census rounds ages up or down.
1841 census: Newtown, Abbotshall, Fife, Scotland
Andrew Nicol 20 1821 Fife, Scotland
William Nicol 15 1826 Fife, Scotland
Betsy Nicol 25 1816 Fife, Scotland
Jane Nicol 25 1816 Fife, Scotland
Margt Nicol 20 1821 Fife, Scotland
Mary Nicol 15 1826 Fife, Scotland
Is James one of the family but living on his own.
1841 census: Linktown, High Street, Abbotshall, Fife, Scotland
David Oliphant 20 1821 Fife, Scotland
Margt Oliphant 25 1816 Fife, Scotland
Durham Robertson 35 1806 Fife, Scotland
Cathrn Robertson 77 1764 Fife, Scotland
Wm Cooper 60 1781 Fife, Scotland
Elizabeth Cooper 60 1781 Fife, Scotland
James Nicol 20 1821 Fife, Scotland
Two James Nicol
1881 census: 199, Links Street, Abbotshall, Kirkcaldy, Fife, Scotland
James Nicol Head Married 60 1821 Flax Dresser Kirkcaldy, Fife, Scotland
Christian Nicol Wife Married 58 1823 - Kirkcaldy, Fife, Scotland
….
1881 census: 320, High Street, Kirkcaldy, Fife, Scotland
Emelia Irvine Widow 71 1810 - Kirkcaldy, Fife, Scotland
Isabella Irvine 26 1855 Shopkeeper Kirkcaldy, Fife, Scotland
James Nicol Brother Widower 60 1821 Shoemaker Kirkcaldy, Fife, Scotland
James Nicol, shoemaker, died 1897, High Street, Kirkcaldy.
Widower of Ann Douglas and son of James Nicol & Isabella Greig.