Cory family history wanted

Hi, my name is Felicia and I'm just starting my search for any members of my famly tree. I would like to have a genealogy chart for my children. I believe my ancestors came from Ireland. My current relatives that I know of are in Wisconsin and Indiana. My father's name was Richard Lee Cory, son of Elmer Eugene Cory (Mary Myrtle). One of my grandmother's was Katherine Threlkeld. I also have an ancestor named Shirley Fielding Thomas. I think my grandfather's parents were Lida Mae (Brown) Cory and William Cornelious Cory. I don't have grandparents or parents around any longer that I can confirm these with, and as I said, I am just beginning my search and thought this was as good a place as any to start. If anyone can help me sort any of my ancestors out, I would love to hear from you.
Sincerely, Felicia Cory Lewerenz.