Beth,
I may not be of any help but I feel there is a connection! In the
marriage record you cited in st Clair cty Ill for Benjamin there is an
Elias Casterline listed married to a Catherine Morgan 7-14-1838. It seems
probable to me that Benjamin is father to Elias- My great grandmother
Lucinda Elizabeth Casterline was born in Des Moines Cty Iowa in 1836-I
have not identified her father and mother but in the Iowa 1850 census, I
found Lucinda living with Elias Casterline at age 16 there was also two
Benjamin Casterlines in the same area and census there were several other
Casterlines in the same general area of Keokuk county specifically in the
Sigourney area. I have been unable to go to that area and search church
records and other sources but hope too. There is a Jonathan Casterline
that was in both the St Clair,Ill and Iowa Census. Its not much help for
you but I feel they are all related in some way
Good Searching
jgolden12(a)juno.com