As far as I know the Horans always lived on the west side of Chicago. As far as to Ponsonbys - I often heard my grandmother mention them and James and Elizabeth had the following children - Martin, Milton, Bernice (Beck), Hazel (Bosworth), and Edna (Kopp).
My relationship to the Horans is through my grandmother - Helen (Nellie) Horan who married Frank Kennedy. The following are the names of her brothers and sisters. Matthew, Martin (married Madeleine Dunn), James (married Elizabeth Ponsonby), John (Spouse unknown but children were Marcella, Clement, Sherman and others - they loved on the South Side of Chicago), Mary ( also known as Manie - married Stuart Rotchford, Hannah( married Robert Nickle and they lived near Streator),Eugene (married Nellie Mackey, Thomas who died as an infant and Catherine (Katie who married Thomas McAuliff. Does any of this sound familiar? I have a family picture of all of this Horan Family.
Hope this will help you.