U.S., Quaker Meeting Records, 1681-1994:
Fairfield Monthly Meeting Record of Marriage, Births and Deaths:
Allen Barnett, son of Wilson and Mary Barnett was born on 1 May 1838, Marion Co, Indiana
also listed were
Eli Barnett, born 5th mo, 4th day, 1841
Louisa Barnett, born 6th mo, 26th day, 1845

1850 United States Federal Census in Decatur, Indiana:
Wilson Barnett 36, born in Indiana
Mary Barnett 31, born in Ohio
Allen Barnett 12, born in Indiana
Eli Barnett 9
Louisa Barnett 5
Preston Barnett 2

1860 United States Federal Census in Jackson, Iowa:
Wilson Barnett 46
Mary Barnett 44
Allen Barnett 22
Eli Barnett 19
Louisa Barnett 15
Preston Barnett 11

U.S, UK and Ireland, Quaker Published Memorials, 1818-1919, "The Annual American Monitor for 1968, Obituary of the Members of the Society of Fiends in America", page 6
Ruth Barnett, wife of Allen Barnett, passed away 8 Jan, 1862, aged 20 years.

Iowa Marriages, 1851-1900: Allen Barnett and Louisa J Lamb were married in Guthrie Co, Iowa, on 5 Mar 1868

1870 United States Federal Census in Penn, Iowa:
Allen Barnett 32, born in Indiana
Louisa Barnett 20, born in Indiana
Luella Barnett 1, born in Iowa

1880 United States Federal Census in Penn, Iowa:
Allen Barnett 42 Self (Head)
Louisa J. Barnett 30 Wife
Luella Barnett 11 Daughter
John M. Barnett 6 Son
Bertie S. Barnett 7/12 Son

1900 United States Federal Census in Whittier, California on Friends Avenue:
Allen Barnett, 62, born May 1838, fruit grower
Louisa Barnett, 50, born May 1850
Burt, 20, born Mar 1880
Abbie R, 18, bon Dec 1881

1910 United States Federal Censusin Los Nietos, California, at 575 Magnolia Ave:
Allen Barnett 71 Head, fruit grower
Louisa J Barnett 59 Wife
John M Barnett 36 Son, chauffer
Minnie J Barnett 40 Daughter-in-law

1920 United States Federal Census in Whittier, California at 545 Magnolia Ave:
Allen Barnett, 81, widower, rancher

California, Death Index, 1905-1939: Allen Barnett, age 86 died on 20 Jan 1925 in Los Angeles Co, California

U.S., Hinshaw Index to Selected Quaker Records, 1680-1940
Barnett, Allen (b. 1838,5,1 Marion, Ind; d. 1925, 1, 20;
s Wilson and Mary Barnett) m 1868, 3, 5 Gustine, Iowa, Luisa Jane Lamb (b. 1850, 5, 27 Randolph NC, d 1919, 2, 13
dt Obed and Abigal Lamb and had issue:
John M. 1873, 8, 9, Madison, Indiana
Burt L 1880, 3, 30, Madison, Iowa
Abbie R (b 1881, 12, 8 Madison, Ia
Luella is listed with a line through it and no birth date