I believe we are researching the same lines in multiple ways both through Odom and Johnson. Most importantly, I believe your Mattie Bell Johnson to be the same as the Mattie Bell Johnson I have listed born ca 1881 to
Charles Henry Johnson (born 8 Jan 1851 in GA - died 13 Oct 1916 in Escambia Co., FL) and Ariadna A. "Arie" Respess (born April 1858 in GA - died ca 1923 in Escambia Co. FL.). Both are buried at Rays Chapel Cemetery in Bogia, Escambia Co., FL. My Mattie Bell Johnson married a Riley White on whom I have no further information. They had the following children know to me... Ruby White, Peal White, Opal White (Odom), Narvie White and Evelyn "Sister" White (Barcus.) This information was given to me years ago by personal knowledge and recollection of Mildred Marie Johnson who was a grandaughter of Charles Henry Johnson
Charles Henry & Arie Respess Johnson also had these other children known to me... Walter Leonard Johnson born 24 June 1875, Ella Johnson (Bryars) born October 1878, Willie Pearl Johnson born August 1883, John Henry Johnson born 24 January 1886, Hubert Richard Johnson born 20 May 1888, Emma Johnson (Ducan) born December 1894, Dolly Marie Johnson (Drumalla) born June 1897, Truie G. Johnson born 27 January 1901,
This Mattie Bell Johnson would have been the grandaughter of my Redding & Charlotte Johnson.
I also have and Odom line that connects to the Johnson Line. That is through Mary Ann Odom (born 25 August 1843 in AL - died 4 Dec 1937 in Baldwin Co., AL) who married Andrew Jackson Gideons, Sr.(born 9 Dec 1842 in Jackson Co., FL - died 17 July 1915 in Baldwin Co., AL). Their daughter Annis Mary Mahala Gideons married William Thomas Penton and their daughter Carrie Lee Penton married the above mentioned John Henry Johnson , son of Charles Henry and Arie Respess Johnson.
The above mentioned, Mary Ann Odom was the daughter of William H. Odom (born 1824) & Mary Annis Parker (born 03 September 1828 in AL - died 1907 Baldwin co., AL)