There are only two children, David & Joseph, who are known for sure to have been the children of Daniel Haston.  

Three others, Catherine, Isaac, & Jesse lived in White County, TN at the time Daniel's family was there, and were probably his children.  There is a fair amount of evidence to substantiate their relationship to Daniel Haston, especially for Isaac who seems to have inherited 50 acres of Daniel's farm.  

An 1802 power of attorney document, issued in Knox County, TN, refers to Daniel Haston as "Dannel Haston Sr."  This indicates that Daniel Haston either had a son by that name or a close relative by the same name, such as a nephew.  But we do not know for sure who that would be.

The biographical sketch of Daniel's grandson, William Carroll Haston, says that there were thirteen children in Daniel's family.  That number would be consistent with typical family sizes of that day.  Thus, it is likely that Daniel Haston was the father of several other children, whose names and life histories we do not know. 

The Danl Heaston who appeared on the 1775 Dunmore County, VA census had two daughters (apparently) who were born before November 1775.  If this was the same man as the White County, TN "Daniel Haston" then there were at least two sisters in Daniel Haston's family who were older than David Haston, the oldest known son of Daniel.