I also have a Roderick McDonnell supposedly b. 1762 in Scotland. he married Catherine Cameron. he died abt 1852 and Catherine died 1884 at Stormont.
They had two known sons, John Hugh b. 1810 at Martintown and died 1872 at Chapeau Que. he married Flora McGillis in 1843. a second son is highly suspect: William b. abt 1806.
All of this information has not been documented and its source unknown however I would love to keep this thread going.