Get the great-great-great-grandfathermug. 
Get the great-grandfathermug. 
Get the step-great-grandfather-in-lawmug. The great-grandfather of one's spouse.
My great-grandfather-in-law is a good person.
by Rwopazaq November 24, 2019
Get the great-grandfather-in-lawmug. 
My step-great-grandfather is a good person.
by QWP998756 October 15, 2021
Get the step-great-grandfathermug. Great-great-great-grandparent's father.
great-great-great-great-grandfather.
by Simaduria July 26, 2024
Get the great-great-great-great-grandfathermug.