George Charles Keppel Johnstone was born 5 August 1841 in Gore House, Kensington, Greater London, England, United Kingdom to George Frederick Johnstone, 7th Bart (1810-1841) and Maria Louisa Elizabeth Frederica Craven (1815-1858) and died 12 January 1912 Bournemouth, Dorset, England, United Kingdom of unspecified causes. He married Agnes Caroline Chamberlayne (1845-1925) 29 June 1875 in Hursley, Hampshire, England, United Kingdom.
|Offspring of George Charles Keppel Johnstone and Agnes Caroline Chamberlayne (1845-1925)|
|George Frederick Thomas Tankerville Johnstone, 9th Bart (1876-1952)||1 August 1876||9 January 1952 Reading, Berkshire, England, United Kingdom||Ernestine Anne Porcelli-Cust (-1955)|
|Charles John Johnstone (1877-1937)|
|Agnes Louisa Barbara Snowflake Johnstone (1878-1960)|
|Rose Mary Adeline Dagmar Amelia Johnstone (1883-1952)|