Need help in finding the right person

[Nancy Jaderen]

I am looking for the parents of Cherstin Andersdotter,born in 1749.She married Anders Ersson who was born in 1745 in Edeby,Jäder.I am  
assuming she was also born in Jäder and when I checked the HFL I found many daughters with that name and date.There are also several listed on Family Search.Since I do not have the birth date I would have the same problem with the birth records. Anders and Cherstin had a son,Anders,
born June 14,1802 in Jäder who later took the name Jäder?n.I would appreciate any help in finding the right Cherstin. Thank you