The Genealogical Record of the Barnum Family confuses him with his 5th cousin, Robert Grandison Barnum.
In the 1910 US Census for District 50, New Orleans Ward 3, Orleans County, Louisiana the family of Grandison A. Barnum was enumerated as follows:
Dwelling #293; Family #301
Barnum, Grandison A.; Head; M; W; 30; 1st marriage; Married 3 years; b. Connecticut; Father b. Connecticut; Mother b. At sea; Speaks English; Manager; Carpet department; Wage earner; Employed full census year; Can read and write; Rents non-fram home
Barnum, Stella; Wife; F; W; 25; 1st marriage; Married 3 years; Mother of 1 child; 1 child living; b. Louisiana; Both parents b. Louisiana; Speaks English; No occupation; Can read and write
Barnum, Winifred; Son; M; W; 5/12; Single; b. Louisiana; Father b. Connecticut; Mother b. Louisiana; No occupation
[N.B., The enumerator made an error in showing Winnifred as a son]
World War I Draft Registration Cards, 1917-1918 about Grandison Ansell Barnum. Name: Grandison Ansell Barnum; City: New Orleans; County: Orleans; State: Louisiana; Birth Date: 20 Aug 1878; Race: White; Roll: 1684917; DraftBoard: 4; Age: 40; Occupation: Merchandising Manager; Nearest Relative: Stella Barnum; Height/Build: Medium/Stout; Color of Eyes/Hair: Brown/Brown
In the 1920 US Census for District 92, New Orleans Ward 5, Orleans County, Louisiana the family of Grandison A. Barnum was enumerated with the family of his wife's sister and brother-in-law, as follows:
Dwelling #293; Family #301
Rainecke, Frederick D.; Head; M; W; 54; Married; Can read and write; b. Louisiana; Both parents b. Louisiana-French; Speaks English; Secretary; [illegible]; Wage earner
Rainecke, Ida G.; Wife; F; W; 44; Married; Can read and write; b. Louisiana; Both parents b. Louisiana-French; Speaks English; No occupation
Barnum, Grandison; M; W; 41; Married; Can read and write; b. Connecticut; Both parents b. Connecticut; Speaks English; Manager; Department store; Wage earner
Barnum, Stella; Sister-in-law; F;W; 35; Married; Can read and write; b. Louisiana; Both parents b. Louisiana; Speaks English; No occupation
Barnum, Winifred; Niece; F; W; 12; Single; Can read and write; b. Louisiana; Father b. Connecticut; Mother b. Louisiana; Speaks English; No occupation
Grandison was apparently well traveled. He is listed in the passenger manifests for the following voyages: S.S. La Lorraine, La Havre-New York, 29 Mar-6 Apr, 1913 S.S. Siberia Maru, Hong Kong-Shanghai-Nagasaki-Kobe-Yokohama-San Francisco (boarded Yokohama), 8 Mar-22 Mar, 1917 S.S. Venezuela, Yokohama-San Francisco, 27 Jun-16 Jul, 1919 S.S. Majestic, Cherbourg-New York, 23 May-29 May, 1923 (accompanied by his wife) S.S. Majestic, Southampton-New York, 7 May-13 May, 1924 S.S. Olympic, Southampton-New York, 8 Jun-15 Jun, 1926
Social Security Death Index about Grandison Barnum. Name: Grandison Barnum; SSN: 297-07-7450; Last Residence: 70125 New Orleans, Orleans, Louisiana, United States of America Born: 20 Aug 1878; Died: Feb 1968; State (Year) SSN issued: Ohio (Before 1951)