Elizabeth Johnstone is under her mother’s maiden name. Her mother married after Elizabeth was born 1890 to Martin Jardine.
Rather strange that the 1901 for Martin Jardine has a 1yr old Elizabeth. Also shows Elizabeth Jardine was b England 1862 but 1881 & 1891 shows England 1869
1891 also has a 5mth old Joseph Jardine who is with Martin & Elizabeth in 1901
For info. 1891 census
Town Hawick
County Roxburghshire
Address South Trinity Street
David Johnstone 58 Head
Elizabeth Johnstone 61 Wife
Elizabeth Johnstone 22 Daur
Elizabeth Johnstone 3 Boarder
Joseph Jardine 5 Ms Boarder
1901 census
Town Langholm
County Dumfriesshire
Address 4 & 6 Rosevale St
Martin Jardine 31 Head
Elizth Jardine 39 Wife
Joseph Jardine 10 Son
David Jardine 8 Son
James Jardine 3 Son
Elizth Jardine 1 Daughter
Staplegordon CemeteryMartin Jardine age 33 Burial 30 Aug 1902
James Jardine age 17 Burial 11 May 1915
Elizabeth Jardine age 68 burial 23 Jan 1937
widow of Martin JardineJoseph Jardine age 28, footman Burial 18 Aug 1919
son Martin McRae Jardine age 2 1/2 years burial 27 Aug 1919
Cemetery Section: Centre Interment Number 157
England & Scotland, Select Cemetery Registers, 1800-2024 - not seeing an 1891 burial for
Elizabeth Jardin at Staplegordon Cemetery

Mother
Elizabeth Jardine next of kin on her son
David’s Army pension record year 1914
address 22 Beaconsfield Terrace Harwick