See the extensive discussion of Ezekiel and his known and possible relatives, including DNA evidence.
Some conclusions from the article:
* It isn't known who Ezekiel's parents were. His father may have been named Robert as indicated in a family history written in 1906, or he may have been a Henry Inman. Other suggestions presented in online trees (such as an Ezekiel Inman, Sr) are less credible.
* Hezekiah Inman who died before 1779 in Burke County, North Carolina "is probably a brother" of Ezekiel.
* The Lazarus Inman who died 1781 in Rockingham County, Virginia was not his child [but was of an age that he might have been a brother].