I believe your Martin Phillips b. 12 July 1801, and my William Phillips b. Nov 1805 (my GGG grandfather) were first cousins. Martin was son of Robert Phillips, and William was son of Gabriel Phillips. Robert and Gabriel's father was John Phillips.
He and his wife were listed in the Prentice Price Records as living in Hawkins Co. District 14 in 1850, Martin was 49 and Jane Klepper was 37 years old. Two of his children included Susan 21(m. Setzer) and Margaret 19(m. Coward)also living nearby. Martin was born NC.
Martin Phillips is listed several times in the marriage records as JP.
I can send you the info I have.