I've tried to find out if Leslie Rankin had any brothers or sisters, I assume he had. His death certificate says died aged 97 in 1904 in Garvagh, but other source (below) suggests maybe born in 1826.
Lord Garvagh's Leases-
1st December 1805. George Bell and James Rankin.
Lease of a Double tenement for 31 years or three lives. George Bell Gortfad and James Rankin Garvagh, double tenement on the Bleach-green in Garvagh next to that held by David Millar, fifty feet in front with a passage of seven and a half feet and extending to the river the same breadth. Said double or two tenements to be built and slated the same height as M’Gettigan’s. Lives of Anne Rankin daughter of James aged one year, James Bell 18 years and Samuel Bell aged 2 years sons of George Bell.
1st December 1815. James Rankin of Garvagh, Carpenter. The two tenements on the Bleach-green in Garvagh adjoining James McFall’s tenement containing fifty feet in front with a sufficient passage for a gateway to accommodate the said two tenements, bounded on the north by that part of the Bleach-green that is yet unset, on the south by the River Errigal, on the east by James McFall’s Tenement and on the west by the street of Garvagh, said tenement to be slated and finished similar to the other tenements already built on the said Bleach-green.
Not sure if this one connected-
1st January 1807. John M’Wade senior to John M’Wade jun. lease of one half of a tenement. Life of James Rankin the elder of Garvagh, Blacksmith.
8th December 1827. Isaac May, Shoemaker, Garvagh. Tenement containing twenty five feet seven inches in front and running back two hundred and ten feet seven inches, bounded on one side by the tenement occupied by James Rankin and on the other side by the tenement now unoccupied which adjoins the school house. In the front by the street of Garvagh and in the rear by the boundary as now laid off by Daniel Kane, being as far back as the wall built to enclose the school house tenement and measuring from front to rear two hundred and ten feet seven inches. Lives of Charles Rankin son to Hugh Rankin of Liscall, aged 5 years, George Rankin aged 3 years and Leslie Rankin aged 1 year sons of James Rankin carpenter of Garvagh. Lease for 31 years. NOTE: Now William McMaster.
The James Rankin who was listed as Carpenter in Garvagh in 1815 is Leslie's father. What's interesting is he lived on the bleach green according to the above from the lease records, which I've heard was located near ballynameen in Garvagh. I know Rankin's owned a bleach green there in partnership with the Ogilby family.