Donald McNicoll was from a military family in Argyll who died in 1814 at Bergen op Zoom in the Netherlands as a Captain in the Royal Scots In 1812, while serving in Demerara, he married Anna Johanna Frislin, the daughter of a deceased Dutch plantation owner whose widow owned Ann's Grove on the east coast. They returned to Scotland where their son was born in 1813.
Captain McNicoll's younger brother Colin, a lieutenent in the Royal Scots, had died in Demerara in 1809. When Donald died his mother, Mary McNab petitioned Lord Palmerston for a pension pointing out that two of her brothers and four of her five sons had died in the army.
Anna Frislin's (Mrs Donald McNicoll's) mother and step-father came from Demerara and settled in Somerset. Her sister Mary Catherine died in Edinburgh in 1815.
For a family tree see Donald McNicoll on Ancestry (subscription required)