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*When you are trying to find the next generation back (i.e. your grandfather's father or further), It may be good to allow a 20 to 40 year window prior to the last known ancestors birth. This can be narrowed down if you know the birth dates of several children in the family. | *When you are trying to find the next generation back (i.e. your grandfather's father or further), It may be good to allow a 20 to 40 year window prior to the last known ancestors birth. This can be narrowed down if you know the birth dates of several children in the family. | ||
*Calculate approximate birth years from their age on the census or other documents. See http:// | *Calculate approximate birth years from their age on the census or other documents. See http://bcgcertification.org/skillbuilding-date-calculations/ | ||
*It has been noted that in America and northern Europe men usually married at about age 25, women at about age 21. However, this is only an average with widespread variation, and is different for different places. While this may be helpful when looking for birth records, recording a birth date of about 21 or 25 years before a marriage as fact on community trees such as FamilySearch Family Tree often causes problems with mis-identification. If you have a marriage date, record that, but don't record a birth date based on a known marriage date unless there is an associated age listed at the time of marriage. | *It has been noted that in America and northern Europe men usually married at about age 25, women at about age 21. However, this is only an average with widespread variation, and is different for different places. While this may be helpful when looking for birth records, recording a birth date of about 21 or 25 years before a marriage as fact on community trees such as FamilySearch Family Tree often causes problems with mis-identification. If you have a marriage date, record that, but don't record a birth date based on a known marriage date unless there is an associated age listed at the time of marriage. | ||
*On average, the first child is born one year after the parent’s marriage. Subsequent children are usually born about every two years. | *On average, the first child is born one year after the parent’s marriage. Subsequent children are usually born about every two years. |