He is shown in some sources as Abraham and in others as Abram.
In the 1850 US Census for Denning, Ulster County, New York the family of Abram Barnum was enumerated as follows:
Dwelling #37; Family #37
Abm. Barnum, 41, M, Overseer, Real property #2,000, b. New York
Sarah Barnum, 38, F, b. New York
George Barnum, 17, M, Labourer, b. New York
Mary Barnum, 12, F, b. New York, Attended school within the year
Angeline Barnum, 10, F, b. New York, Attended school within the year
Henry M. Barnum, 8, M, b. New York, Attended school within the year
Sarah Barnum, 6, F, b. New York, Attended school within the year
William, 4, M, b. New York
Adelia, 1, F, b. New York
Joseph Gilbert, 20, M, Labourer, b. Vermont
Amanda Barnum, 15, F, b. New York, Married within the year