NameUnknown Grylls 
Birth23 Dec 1920, New Zealand
Misc. Notes
Year of registration, country of birth, from search on New Zealand BDM website in January 2021:
1921/14196. Grylls, [No record]. Mother: Martha. Father: Edwin Charles
Full date of birth of 23 December 1920 from further searching in January 2021 on BDM Search by incrementally changing the date range for the birth.