How to abbreviate Great-great-grandmother?

The ways to abbreviate Great-great-grandmother.

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GGGM:
Great-great-grandmother(Genealogical, Genealogy)
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APASmart Define. (2017). great-great-grandmother. Retrieved October 2, 2026, from http://smartdefine.org/great-great-grandmother/abbreviations/a
ChicagoSmart Define. 2017. "great-great-grandmother" http://smartdefine.org/great-great-grandmother/abbreviations/a (accessed October 2, 2026).
HarvardSmart Define 2017, great-great-grandmother, Smart Define, viewed 2 October, 2026, <http://smartdefine.org/great-great-grandmother/abbreviations/a>.
MLASmart Define. "great-great-grandmother" 9 October 2017. Web. 2 October 2026. <http://smartdefine.org/great-great-grandmother/abbreviations/a>