Which James Mohan is correct

In the Mohan Family tree, William Mohan, born in 1784, had a son James, born in 1814. I have been communicating with the Molloy Family tree who has the same William and has a son James, born in 1811. Need some help identifying which James is correct. If any of you also have info on William's parents or spouse, please send that along.

Bill Mohan