I find at Ancestry that the family is in Wayne Co. Mississippi in 1910 census, name transcribed as Tordon and 1920 transcribed as Jordan. There are older children: Julius, Maggie, Edward or Eddie, then Truman, etc. The youngest you have spelled as Murdock could be Murdoc.
I find a U. S. Army Enlistment Record for a Murdoc A. Gordon b. abt 1918 in MS, enlisted 1945 in Indiana and lived in North Carolina. I have also found a Murdoc A. Gordon age 89 b. 1918 living in Tacoma, Pierce Co. Washington. Email me directly and I will send you the address and ph # if you want it.
D. Simmons ancestryseeker at gmail dot com Use @ and .