I realize this is a long shot as your post was in 2001 on geneology.com but, after the passing of my mother, I was feeling lost & began researching my ancestry.Long story short, my grandmother was Cecilia Evert (Sullivan).
Her parents were William Sullivan & Helen Winchell.
William's parents were Tom Sullivan and Catherine McGivern.
Catherine's parents were Michael McGivern & Catherine Ford.
I also have Catherine's parents as Patrick Ford & (Corbeth) but I'm not sure if that is her first name or madien...
On Michael's side I just have a bith date of his father as 1780 and I'm not even sure how I got this.