I went to ancestry.com and find a grave and even familysearch and I stayed on this for over 4 hours and I will give you what I have but It is up to you to tell me if this is correct or not.
William Brooke Cochran Born 1864 and died 1937 and on ancestry.com it has this:
William Brooklyn Cochran born 1 Jan 1864 and died 8 March 1937 Antlers, Pushmataha, Oklahoma.
Wife is Louisa Adline "Lula" Breeden- born 1875 - died 1972.
I think maybe this is his father - William Brooks Cochran - born 20 March 1838 - Petty Twp, Lawrence Co, Illinois. died 5 May 1877 Lawrence Co, Ill. Parents Thomas Cochran 1802 - 1863 and Mary Dickens 1806 -1850 His children are:
James Cochran - B. 1860; John Cochran - b. 1860; Jane Juanita Cochran - b. 1862; William Brooklyn Cochran - b. 1864 Died 1937; Julia Ann Cochran - b. 1869 - died 1923;
Sarah Elizabeth Cochran b.1871 - 1907; Bert Cochran - b. 1873; Isaac Cochran - b. 1875; Archie Cochran - b. 1879
I don't know if this is right since I didn't have a lot of info, however let me know if this isn't and I will research it again.
1920 Myrick, Johnston, OK Census
William B. Cochran - age 56 born 1864; wife -Lula - age 39; Hattie - age 22; Edgar - age 17; Alford - age 15; Gurta - age 13; Charles - age 8; Willie C - age 5.
I found this also don't know if it is in your family; William B. Cochran - B. Nov 1840 - died Oct 18, 1914 Kansas; --Wife Charlotte M Clugston Cochran -b. 1843 and died 1941. they did not have children that I could find.
If you need more help then please let me know.Nancy