On 19 April 1943 at Union county, Arkansas, Marvin Keith, age 32, married Mina Mae Helton, age 31.His place of residence was Gay, Meriweather county, Georgia; her place of residence was El Dorado, Union county, Arkansas.The marriage license and certificate are here:https://familysearch.org/pal:/MM9.3.1/TH-266-13035-113175-49?cc=1417439
There censuses for 1950-2010 are not available, so we can't find them with their children.
According to the Social Security Death Index, Marvin Keith was born 8 July 1910 and died 3 January 1990 at Manchester, Meriweather, Georgia.The SSDI record is here:https://familysearch.org/pal:/MM9.1.1/J2NN-QZD
Marvin shows up with his parents and siblings in the 1920 census of Meriwether county, Georgia: Household Gender Age Birthplace SELFDavid D KeithM 63y Georgia WIFEEmma KeithF 53y Georgia DAUFannie KeithF 24y Georgia SONRaymond KeithM 23y Georgia DAUAldora KeithF 22y Georgia DAULndie KeithF 21y Georgia DAUNellie KeithF 19y Georgia DAURubie KeithF 16y Georgia DAUJessie KeithF 13y Georgia DAUAnnie May KeithF 12y Georgia SONMarvin KeithM 9y Georgia The 1920 census record is here: https://familysearch.org/pal:/MM9.1.1/MJ6L-W6V
Emma must have been a second wife, because in the 1900 census of ED 41 Militia Districts 657, 705, Rocky Mount, Warnersville Rocky Mount village, Meriwether, Georgia, David and Emma state that they have been married 9 years and that she has had 6 children, 5 still living, yet there are 10 children in the household, the oldest at 21 years: Household Gender Age Birthplace HeadDavid S KeithM 44 GEORGIA WifeEmma I KeithF 34 GEORGIA SonVirgil KeithM 21 GEORGIA SonHenry KeithM 19 GEORGIA SonMarvin KeithM 17 GEORGIA SonLuther KeithM 15 GEORGIA SonAaron KeithM 12 GEORGIA DaughterCarrie KeithF 9 GEORGIA SonRaymon KeithM 6 GEORGIA DaughterFannie KeithF 5 GEORGIA DaughterAldro KeithF 3 GEORGIA DaughterLudie KeithF 2 GEORGIA The 1900 census record is here: https://familysearch.org/pal:/MM9.1.1/M3JK-M5X