Alexander families in Texas

Looking for info on my Alexander families:

Brazine Alexander (paternal grt grandmother) - I don't know her maiden name or my grt grandfather's name.
Brazine's children were:
Mitchell Alexander, Sr. (my grandfather)
Emma Alexander
Fisher Alexander
Lessil Alexander (may be spelled wrong in the census - may be Leslie)
Jacob Alexander
(all of the above except Mitchell were listed in the 1910 Panola, TX census. According to this census Brazine was born in LA)

Mitchell Alexander, Sr. (abt 1900-1970) married Minnie Evelina Richardson (1909-1974) in Texas and had five children, all born in Texas:
Mitchell Alexander, Jr. (my father) 1926-2005
Minnie Rose Alexander 1928-1985
Eddie Pearl Alexander 1930-1980
Doris Mae Alexander 1931
Clarence Edward Alexander 1932
This family settled in Midland between 1935 to 1952.

Some of my elder cousins told me that they called Mitchell, Sr. by the nickname "Monk". My dad and aunt Doris said that they barely remember him because he left when they were very young. Any information you have or might share on my family members will be appreciated.

Thank you - Michelle