Hi,

1910 Hewitt, Carter, OK
David C. Holt, b. AL, 35, Ma11yrs, general farmer
Barcy, wife, b. TX, 28, 6/2 children
Roy D., b. OK, 7
Velma L., b. OK, 5

I didn't find any information for him in Ancestry and FamilySearch until his death info.

Doy D. Holt
Born: Aug 1, 1902
Died: March 14, 1962
Buried: hweitt Cemetery, Wilson, Carter, OK
Source: www.findagrave.com

You can contact the Carter County Genealgical Library, http://gshm.org/genealogical-library and order a copy of his obituary. His wife and children should be listed in it. Successful Searching!