My gggrandmother Mary Ferguson was born 1780/1781 the daughter of Donald Ferguson a fisherman and Mary McAulay. She married Cornelius Bonnar in Glasgow in 1810 and had at least one child Neil who married twice.
His first marriage was in 1835 to a Mary Mcnamee or McNairne he then married Elizabeth Cunlisk in 1849 and had 9 children.

Iwould be very grateful for any info and am happy to share my findings so far.