I found this information someone has posted on internet. This may answer your question. Looks like Sam Moniac is her grandfather. according to this Elizabeth "Bessie" Moniac married George Clinton Steadman on April 9, 1903.
Hope this will help you.
SAM MONIAC and SUSAN MARLOW With information from Steve Travis Sam Moniac LifeNotes: Appears in 1860 and1870 census Escambia Co. AL, and in 1880 census of Monroe Co. AL Born: 1811-3 AL Married: between 1833-1837 Died: 1896, buried in Huxford Indian Cemetery, AL. Parents: Dixon Moniac and Elizabeth "Betsy" Ehlert / Elliot Susan Marlow LifeNotes: Born: 1814 Married: Died: 1894, buried Madison-Moniac Cemetery Parents: James Marlow, a Creek Indian, who lost his life in the Massacre of Ft. Mims, and Suzanne ? Their children were: David John Moniac, born ca 1838 in Monroeville, AL. See his page. Married Sarah Catherine Hales (b. ca 1838). Their children were: Maneriva Moniac (b. 7/10/1860; m. Alexander Boone, son of John Boone, Jr.; d. 7/16/1918, buried Lindsey Cemetery), Martha " Mattie" Moniac (b. ca 1862; m. Gideon Gibson, son of Margaret Moniac and William David "Bart" Gibson). David John Moniac died before 1877. Sarah Catherine Hales married 2nd on 5/17/1877 to Origine Boone, son of Deramey Irene Tarvin and John Jarvis Boone). Martha Moniac, born ca 1838-40 in Mt Pleasant, Monroe Co., AL. Michael M. Moniac, born ca 1840-2. in Mt Pleasant, Monroe Co., AL. Married Julia Browning on 10/21/1861. Died 21 Oct 1861. James P. Moniac, born ca 1843-4 in Mt Pleasant, Monroe Co., AL. Married 1st- Mary Ann or Jane Williams (b. 1860-5 ; d. 1881), daughter of Wash and James Williams. Their children: Mary Adeline Moniac (b. 1872-4; never married), Susan I. Moniac (b. 1876), James I. Moniac (b. 1879), Elizabeth "Bessie" or "Betsy" Moniac (b. 1886 in AL; m. George Clinton Steadham, son of John Victor and Mary McGhee, on 9 April 1903). Married 2nd- Mary Moniac. Their child: Ida Moniac (b. 1882 m. James Williams on 9 April 1886, Monroe Co., AL). Note: not entirely sure which mother goes with later children. Richard "Dick" L. Moniac, born 1846 in Mt Pleasant, Monroe Co., AL. Died 7/11/1870. Mary Jane Moniac, born ca 1846-50 in Mt Pleasant, Monroe Co., AL. Married William Colbert, Jr., son of William Colbert and Celia Sizemore. Their children were: Henry Colbert (b. 1857), David Colbert (b. 1859), Elizabeth "Lizzie" Colbert (b. 1861; m. ? Rackard), William Colbert (b. 1864), Louisa Colbert (b. 1866; m. Aaron Rackard), Waller Colbert (b. 1869). Elizabeth "Lizzie" Moniac, born ca 1848-50 in Mt Pleasant, Monroe Co., AL. Married on 5/26/1873 to John D. Madison (b. 7/1/1840; d. 1897). Their children: Emily Madison (b. 7/25/1875; m. John Ernett Holder; d. 1895, committed suicide following childbirth), James Eugene Madison (b. 8/2/1876; m. Gussie Dewise, daughter of a full-blood Indian; d/ 7/11/1955, buried at Semiar Springs cemetery), Pearl Madison (b. 2/16/1877; m. 1st-Marcus Gentry; m. 2nd-James Alford Arrington; d. 6/7/1949, buried Uriah Cemetery), Ella Virginia Madison (b. 3/12/1879; m. Ed Shipp), Ethel Madison (b. 6/19/1881; d. 1896), Samuel Madison (b. 7/28/1883; d. 1906), William Howard Madison (b. 2/27/1885; m. Ida Williams; d. 1942), Frank Berry Madison (b. 2/17/1888 or 2/17/1890 per tombstone; m. Ola Stacy; d. 8/13/1937, buried Military Cemetery, Mobile, AL) Levitia Moniac, born 1854. Married John Francis Boone, son of John Jarvis Boone, Jr. and Harriet Nancy Poston, (b. 1852; d. 1901). They lived near Presswood Bridge between McCollough and Semiar Springs. Their children were: Charles 'Charlie" Weatherford Boone (m. ? Allen, the sister of George Allen), Harriet N. Boone (b. 11 Feb 1876 in Jack Springs, AL; m. George Washington Williams), Margaret "Maggie" Lee Boone (b. 1878 Escambia Co., AL; m. 1st-John Ernest Holder; m. 2nd ?; d. 25 Dec 1918), Frank Leslie Boone (b. 2/5/1880 in Jack Springs, AL), Daniel S. Boone (b. 12/7/1882 in Jack Springs, AL; m. Cllie McDonald; d. 11 Nov 1943), John Richard Boone (b. 1885 in Jack Springs, AL; m. ? Coleman, daughter of Doc Coleman), Susan Boone (b. 1887 Escambia Co., AL; m. 1st-George Allen; m. 2nd- ?; m. 3rd- ?), Clara L. Boone (b. 1889 in Jack Springs, AL; m. Harvey McClelland), Cora L. Boone (b. 1891 in Jack Springs, AL; m. Ed Kilpatrick). Amelia Moniac, born ca 1852 in Mt Pleasant, Monroe Co., AL. Alexander Moniac, born ca 1850 in Mt Pleasant, Monroe Co., AL. to Some Creek Families & Friends -----------------------------------------------------------------