The birth location of Leonard Lincoln is tossed between Kentucky and Mass. during about the 1800's and unless anyone Knows Leonard Lincolns full name either Middle or first name then I can not find any proof to support him related to Josiah or Not Related to Josiah. What I have narrowed down is that he is related to Levi Lincoln Sr the ex gov of mass. and (his sons Robert, john, elijah all great grand nephews to this ex govenor) this is stated in Robert's Obit and confirmed with elijah's obit that Leonard was Abraham Lincoln's(ex President) 1st Cousin. but no information is given as to how many times removed this first cousin is. but is with the Ex Govenor relation Hence the statement I wrote above. I cant retract without proof.