It is hard to know for sure, but I could not find where he is a Freemason.
Elihu Palmer was born in 1764.
Elihu Palmer died in 1806.
Elihu Embree died in 1820.
Elihu Palmer has written: 'Original sin, atonement, faith, &c' -- subject(s): American Sermons, Christmas sermons 'Principles of nature, or, Development of the moral causes of happiness and misery among the human species' -- subject(s): Deism 'The political happiness of nations' -- subject(s): Freedom of the press 'Principles of nature' -- subject(s): Accessible book, Deism, Free thought
Elihu Vedder died in 1923.
Elihu Vedder was born in 1836.
Elihu Spencer was born in 1721.
Elihu Spencer died in 1784.
Elihu Katz was born in 1926.
Elihu Grant was born in 1873.
Elihu Grant died in 1942.
Elihu Lauterpacht was born in 1928.