Find A Grave, database and images
(https://www.findagrave.com : accessed 01 May 2019), memorial page for John Albert Crawford (8 Jun 1891–30 Jul 1971), Find A Grave Memorial no. 143951368, citing Luling City Cemetery, Luling, Caldwell County, Texas, USA ;
It may be possible to confirm family relationships with John by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
Y-chromosome DNA test-takers in his direct paternal line on WikiTree: