I'm not related. Just found your plot next to my Hopkins and Haddox family plot in Graceland Cemetery, Hamilton Co., Webster City, Iowa. Names listed are Eugene, Christina, Lottie and infant Wiltsey. Sorry, I don't have any dates or know anything else about this family. Other Surnames in Cemetery are Davis, Perry, Wayman, Lamond, Thomas, Benson and Stahl.
My folks lived 1860's to 1920's to give you a rough time frame.