It’s possible the gap between that birthdate of January 8 and what tallies with your calculations, was the period during which ANNA was still in Honolulu with her child, Abercrombie wasn’t lying when he said he saw the Kenyan with Ann/Anna on social occasions. He was convinced the girl and child he saw had to be Stanley Ann Dunham and zero, convinced enough to declare I WAS HERE WHEN THAT CHILD WAS BORN and brave enough to attempt to find that birth certificate once and for all.
THERE WAS NOTHING THERE, he said, remember?
If Mary’s recollection was for something that began late in January or early February, her daughter would still be around 18 months of age if born sometime in July 1959.
Just why are splitting hairs to this extent? Charlette Le Fevre came up with February/March 1962, and no one said a word...
ADDITIONAL:
https://www.mylife.com/gabrielle-toutonghi/e303937578426
Gabrielle Toutonghi is 59 years old and was born on 7/6/1959. Currently, she lives in Seattle, WA. Sometimes Gabrielle goes by various nicknames including gabrielle m toutonghi and gabrielle m greene. Her ethnicity is Caucasian, whose political affiliation is currently a registered Republican; and religious views are listed as Christian
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Figures, if that is correct, then the original article by Charlette Le Fevre showed an incorrect birthdate for Gabrielle.