Brockwell/Cook/Hicks/Helton-TN

Charles William Brockwell married Dorothy Marie Cook in Dixon - Lee County - Illinois 1935.They had 2 children: Robert & Nancy.Charles father was William Brockwell who married Nancy Caroline Hicks (TN?).William's father was John Ephriam Brockwell who married Diania Elizabeth Helton.Children of John & wife:William Harrison Brockwell b: 1883,Thomas A. Brockwell b: 1886, Lillia Mae b: 1889, Hugh H. b: 1892, Margaret Anna b: 1886All the women went by their middle names.William Brockwell & Nancy Caroline Hicks CH: Caroline Mae, Charles William, Lena Elizabeth, Lucy Isabel, Remar Arthur.Can anyone help with parents of John Ephriam & Elizabeth Helton, Nancy Caroline Hicks?Family started out in Washington County - TN around Jonesboro and Embreville; don't have any previous locations.At some point, all 3 men came to Illinois; Lee County & I believe Ogle County.Would appreciate any info on this family.Happy to correspond & exchange.