Robert Grant, described as a merchant, was married to Eliza Davies in Kingston March 2 1805 (The Parish Register of Kingston, Upper Canada, 1785-1811, part 2).
The couple had several children born in Lachine, some baptised in St. Gabriel’s Street Presbyterian Church in Montreal.

Eliza (birth date unknown)
married to William McDonald (future mayor of Lachine)
October 27 1831, Montreal, Christ Church

John Lewis born in Lachine, baptised 1806, Montreal , St. Gabriel’s Presbyterian Church

Robert born in Lachine, baptised 1812, Montreal , St. Gabriel’s Presbyterian Church

Henrietta spinster, living in Lachine, with her married sister Eliza, in 1851 (census)

Jos. Charles born in Lachine, baptised 1818, Montreal , St. Gabriel’s Presbyterian Church

Questions
1. Is it the same Robert Grant who dies in 1832, buried St. Gabriel Street Church, Montreal, with no indication of age or relatives:
Robert Grant of Montreal [Lachine added on top]… died on the twentieth day of May one thousand eight hundred and thirty two …and was buried on the twenty second…
2. Could it be the same Robert Grant who was involved in the creation of the North West Compagny in 1784 as an associate partner ?