both these dates are before the Parish registers - interested to see which records give years of birth - landholdings might give a sequence of names but females are less common in these records as property passed to eldest son. Wills pre 1650 are generally uncommon and pre 1600 almost non-existant.

If ref is to IGI then see Brian Lawson's warning about lending credence to 'abt' dates unless you have knowledge of where the info came from.