Arnold, Have you seen the 1901 census of London, Ontario? I will post it here, just in case you haven't: 1901 London City, OntarioWard 3 and 4 Division 5page 5entry 3family 45 De Ellion, Georgeheadborn: 26 Nov 1866U.S.immigration: 1894 De Ellion, Marywifeborn: 22 April 1874 Ontario De Ellion, Franklin sonborn: 3 February 1892 U.S. De Ellion, Georgesonborn: 16 December 1895 Ontario De Ellion, Elvasdaughter born: 12 January 1901 Ontario
It appears that Franklin was the child of George and Jeanette; he was born in February and George married Mary in July of that year. It looks likely that Jeanette died in childbirth. Chicago recorded births at that time in the city; it's possible if Franklin was born in the city of Chicago you would be able to get a birth certificate for him.
Also, Pre-1916 deaths in Illinois: Deellion, George G.died 14 May 1903 Chicagoaged 7 yrs. cert # 00003422Cook County Could this be the above George, b. 16 Dec 1895? The age fits, but of course the family is in Ontario in 1901. I did check the index for Jeanette, but found nothing. Of course I looked at every spelling I could come up with for DeEllion, but it could have been spelled oddly, or Jeanette died outside of Cook County; perhaps in Lake.
I know you said your George was married both times by license. If you have already ordered copies of the licenses, have you enquired about a marriage application from Kenosha? Most of the counties in Illinois began asking for information on the application, such as parents' names, ages of bride and groom, birthplaces etc., ca 1882. I know that Chicago didn't ask for parents' names on marriages until something like 1960, but maybe Wisconsin did. Maybe George's parents' names would be on it. What about a death record for George Sr.? Have you been able to locate one?