Hi
Yes, could be, but George, Sophia and Ezekial are definitely George's children because they are with him on the 1861 census.
Are George and Sophia on the 1841 census, maybe James won't be with them then and we can discount him!
Two of the children are in Hill, Worcestershire in 1861 lodging with or near Mary Ann Coltman, formerly Clarke, so that could be another daughter or a cousin! She was born c.1841.
I get the feeling the Clarke family will only be sorted out with the parish registers!
Thanks again,
Mark