Hi,
I don’t know who Leonard Iler is but do possibly have information on some of the other names mentioned.
I received from Morgan Iler several years ago, the Ilers whom I descended from. Namely William Iler (c 1770-1826) who was married to Elizabeth Waggoner (1780-1862).
He had a son John Wagner Iler (1804-1888) who was married to Lavina Logan (1807-1847). Both died at Deersville, Harrison, Ohio
They had a son James Iler (b abt 1835). And he died at Akron, Ohio. No death date but perhaps this James/Jacob is the one referenced in your query. And his mother would have been Lavina/Lovina. I do not see any Leonard Iler in the group of Ilers that he sent.
I am descended through Salem Iler who would have been an uncle to James/Jacob and a younger brother of John Wagner Iler.
Roger Mott