Carole,
My grandfather was Irving Allen De Roo, and my father Richard Allen De Roo, he was an only child. Irv married Harriet Christiansen from Racine Wis. Yes, they lived in Chicago and eventually went back to Racine where they are all buried. I didn't know my grandfather had any nieces. He had two brothers and I didn't think they had any children Can you give me more information? We don't know much more about the De Roo's. My sister Susan and I are starting the search.