Margaret Forrest's father was

James Forrest

James was born in 1803. He became a mechanical engineer and blacksmith. On 24th August 1828, in Glasgow, he married Isabella Young, who was a year younger.

In 1861 they lived at 32 Broomlands Street, Paisley. On 26th June 1875 he died at 11 Abercorn Street, aged 72, of heart disease and bronchitis, from which he had suffered for several years. Isabella had died nearly three years earlier, on Boxing Day, 1872, at 9 Mid Lane, Ferguslie, of cancer of the womb. She was 68.

James's parents were William Forrest, a cotton mill manager, and Mary Campbell.

Isabella's parents were Alexander Young and Marion Rankin.