I have found Erland Carlsson Berg's birth: 21 Sept 1735 in Vika. (Baptized 26 Sept 1735),
and his father Carl Wilhelm Berg's birth: 14 Dec 1702 in Vika. (Baptized 16 Dec 1702).
So here is the list of the fathers in this family...
Carl Wilhelm Berg born ?
Carl Erland Berg born 1702
Erland Carlsson Berg born 1735
Carl Erlandsson Berg born 1761
Erland Carlsson Berg born 1785
Carl Berg born 1809
Carl Wilhelm Berg born 1847
Ian