William Corkill was born about 1820-21, and died between 1870 and 1880 (he is not listed in the census). He married, at Kk Rushen, October 12, 1843, Margaret Crebbin. Margaret was born about 1820-21, and died after 1910 census

William and Margaret Corkill lived in Douglas.
1851 Douglas IOM census: William Corkill 30 joiner Rushen; Margt 27 Rushen; Wm 6 Rushen; Thos 4 Douglas; Michael H. 2 Douglas; Margt J. 3mo Rushen

They emigrated to the United States before the 1860 census.
He is probably the William Corkill listed in the naturalization index, arriving in U. S. May 18, 1856, naturalized in circuit court, Henry County, October 9, 1868. Witnesses: John Corkill, John Garrett. Cert. C-624.

1860 Galva Illinois: Wm Corkill 30 (sic--should be 38?) carpenter IOM; Margt 30 (sic--should be 38?) IOM; Wm 15 IOM; Thomas 13 IOM; Henry 11 IOM; Chas 6 Ohio; Frank 9/12 Illinois

1870 Galva Illinois: William Corkhill 48 IOM; M. 45 IOM; Wm Jr 25 IOM; Thos 22 IOM; Henry 21 IOM; Chas 16 Ohio; Frank 9 Illinois; Lydia 8 Illinois

1880 Lawndale: Heny M. Corkhill 30 farmer IOM; Thomas H. 31 brother farmer IOM; Lydie E. 18 sister IOM; Margaret 57 mother IOM

1900 Lawndale: Michel Corkhill May 9 1851 49 S IOM Immig 1853 47yrs in US Naturalized; Margaret Oct 12 1823 76 wd 7ch-4liv IOM Immig 1853 47yrs in US; Thomas Oct 6 1849 50 S IOM Immig 1853 47yrs in US Naturalized; Maude Kewley niece Apr 15 1887 13 S Illinois; Elliot Shaw boarder Oct 23 1877 22 S Ohio farm hand

1910 Fairbury Ward 3, Livingston County, Illinois (all but Margaret born Illinois): Frank S. Corkhill 50 M1 26yrs; Clara 48 M1 26yrs 5ch-5lv; Pearl 17; Willie 15; Myrtle 11; Margret 87 wd 7ch-2lv England.

Children of Margaret Crebbin and William Corkill: 1900 census states Margaret is mother of 7 children, 4 living; 1910 census–7 children, 2 living

i. William Corkill was baptized at Kk Rushen, July 14, 1844.

ii. Thomas Corkill was baptized at St. Mathews, Douglas, October 18, 1846.

iii. Micheal Corkill was baptized at St. Mathews, Douglas, May 10, 1848. Michael Corkill lived in Lawndale, Illinois.

iv. Margaret Jane Corkill was baptized at Kk Rushen, November 24, 1850.

v. Charles Corkill was born in Ohio, about 1854. He married Emma _____. Charles and Emma Corkill lived in Lawndale, Illinois.

vi. Frank S. Corkill was born in Galva, Illinois, September 21, 1859, and died in Pontiac, Illinois July 24, 1943..He married Clara Pate. Frank Corkill lived in Fairbury, Illinois. Children Pearl, Willie, Myrtle, four others
1910 Fairbury Ward 3, Livingston County, Illinois (all but Margaret born Illinois): Frank S. Corkhill 50 M1 26yrs; Clara 48 M1 26yrs 5ch-5lv; Pearl 17; Willie 15; Myrtle 11; Margret 87 wd 7ch-2lv England.

vii. Lydia E. Corkill was born in Illinois, about 1862. She married, in McLean County, January 19, 1882, Thomas Kewley. Child: Maude