Hi Elizabeth, My GGGGrandfather was John Dennis brother of your William. There was another brother Joseph they all came for free land 1823-1825,as well as Daniel Hanoras brother.We went to Whiddy Island,Bantry Bay Ireland and went thru records there. I don't think we will ever figure out how Jennie is related.There was an old house on Whiddy that apparently that a Dennis family lived in. (The last Dennis family on Whiddy) There was a widow with 8 children in that one room house.Maybe Jennie was related to them. Cheers Dan