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Chronological birthyear estimator Chronological age estimator based on child's birthdate minus 20-25 years (for females), minus 30-35 years (for males) or minus a set # of years in those cases where an ancestor's birth date is known & a descendants' birth date is known (i.e. if five generations are known to have elapsed in a 150 year time interval, then the estimator is used for each generation, every 30 years). Also used for societies where children generally did not accede to kingships, etc., ascension date minus 30 years. Also used based on a known spousal birthdate, i.e. -2-4 years for females, +2-4 years for males.

• Title	Chronological birthyear estimator Chronological age estimator based on child's birthdate minus 20-25 years (for females), minus 30-35 years (for males) or minus a set # of years in those cases where an ancestor's birth date is known & a descendants' birth date is known (i.e. if five generations are known to have elapsed in a 150 year time interval, then the estimator is used for each generation, every 30 years). Also used for societies where children generally did not accede to kingships, etc., ascension date minus 30 years. Also used based on a known spousal birthdate, i.e. -2-4 years for females, +2-4 years for males.
  Short Title	chronological estimator
  Source ID	S108
  Linked to	Jane CALTHORPE Anne DE CHENEY Elizabeth DE FELBRIGG Philippe DE LA POLE Thomas DE MORTIMER Frances HASILDEN Martha LIVESAY William De Bardolf LORD BARDOLF, Of Wormegay Alice OSBOURNE Anne PEYTON Elizabeth PEYTON Frances PEYTON Sir John PEYTON, 1st Baronet Of Isleham Margaret PEYTON Mary PEYTON Robert PEYTON, IV William PEYTON Elizabeth RICH Mary RICH Winifred RICH Thomas SAKEVILL, Sir Family: Miles IV STAPLETON, Of Ingham & Bedale, Sir / Katherine De LA POLE Family: / Mary PEYTON