F, b. 11 February 1843
| Birth* | 11 February 1843 | Sydney Johnston was born on 11 February 1843 at Ontario . |
| Marriage* | | She married John Jeffrey, son of Samuel Jeffrey and Catherine Lowery. |
| Census1871* | 1871 | Sydney Johnston and John Jeffrey appeared on the 1871 Census of Ross Twp, Renfrew County, Ontario, enumerated 1871. Their son William James was listed as living with them. |
| Census1901* | 28 April 1901 | Sydney Johnston and John Jeffrey appeared on the 1901 Census of Ross Twp, Renfrew County, Ontario, enumerated 28 April 1901.1 |