The original name was Giese - changed to Giesey when the family arrived from Germany sometime before 1802. It was changed to Kiesey in about 1880. My great grandfather changed it when he moved from Ohio to Illinois. He sired 13 children, my grandfather being one of them. To find out more information, you may contact Bill Kiesey (my great uncle, I think?)in Washington, Iowa. He retired from medical practice in the army and decided to research the family tree and this is what he came up with. The furthest he went back was 1802. My great-great-great grandfather was born in Zanesville, Ohio in that year. Hope this helps!!!