On his WWI draft registration card (12 Sept 1918), his name is given as “Tom Creed Heathcock” and he is described as “obviously physically disqualified.”
26In 1900 Tom lived with his mother and father in Sutherland Springs, Wilson Co TX.
1900 Census of Wilson Co TX		
Household Members	Age	Relationship
John Heathcock         	66	Head
Mary Heathcock        	60	Wife
Thomas Heathcock 	26	Son
In 1910, Tom and Mamie lived in Wison Co TX.
Name         	                AgeTom H Hethcock       	38
Mamie Hethcock       	21  (Mamie reported having had no children)
In 1920, Tom and Mamie Heathcock lived in Justice Pct. 3, Wilson Co TX.  The only other person listed in their household was Zelmo Clark, Mamie’s brother.  They lived next door to Will and Mollie Heathcock and their children, Clayton, Lillie Bell, and Mary.
1920 Census of Wilson Co TX		
Household Members	Age	Relationship
Tom Heathcock        	47	Head
Mamie Heathcock     	31	Wife
Zelmo Clark            	21	Brother-in-law
Adjacent family was Will Heathcock, Molly and children Clayton, Lillie Belle and Mary.  Two homes away was the family of Dan B. Lay and his family.
In 1930, Tom Heathcock lived in the home of  his nephew, James Arthur Parish:
1930 census of Wilson Co TXName        			Age
Arthur J Parish	      34 (head)
Lottie M Parish	      20 (wife)
Josephine M Parish 	2 10/12 (daughter)
Geraldine Parish	            8/12 (daughter)
Tom Heathcock	      54 (uncle, widowed)
Apparently, Tom and Mamie Heathcock did not have children.
 
Tom and Mamie were first cousins, once removed.