Yes, a family stone (as well as individual members) in Mt. Calvary Cemetery in Imlay City has it spelled "Corneail". In 1870 the family is living in Ray, Macomb County, MI identified as "Cornielle". In 1880, they are living in Riley, St. Clair County, MI identified as "Corniel". In 1900, they are in Almont, Lapeer County under "Corneil". Finally, in 1910 they are still in Almont under the name "Corneal". John Corneail died in 1917. The unusual spelling of the name probably led to confusion on the part of the census-takers way back when. I'd appreciate any information on this family.