Robert Grant Aitken was born 31 December 1864 in Jackson, Amador County, California, United States to Robert Aitken (1826-1895) and Wilhelmina Depinau (1833-1888) and died 29 October 1951 Berkeley, Alameda County, California, United States of unspecified causes. He married Jessie Louisa Thomas (1865-1943) 19 June 1888 in Oakland, Alameda County, California, United States.
|Offspring of Robert Grant Aitken and Jessie Louisa Thomas (1865-1943)|
|Wilhelmina Ellen Aitken (1889-1969)|
|Robert Thomas Aitken (1890-1977)|
|Malcolm Darroch Aitken (1894-1983)|
|Douglas Carryl Aitkin (1898-1992)|