Nellie Kennedy married John Malone Oct 9 1892 in Cambridge NY
Among their children were Leo, Helen, Delia, Elizabeth, Anna, Mary, Theresa, Michael and John
There isn't much to prove Ellen/Nellie belongs to your Kenney/McNamara EXCEPT the Kennedy/McNamara had a son named LEO and a son John and daughter Mary among their children
I'd judge your connection to be good