great-

From Middle English gret- (“great-”), from gret (“great”). More at great.

great-

1. With familial designations, used to denote a removal of one generation

   great-uncle (an uncle of one's mother or father)

   great-grandfather (the father of one's grandfather)

   great-great-grandfather (a grandfather of one's grandfather)

   great-great-great-grandfather, etc.

   (informal) fourth-great-granduncle, etc. (same as great-great-great-great-granduncle)

   (informal) fourth-great-grandfather, etc. (same as great-great-great-great-grandfather)

• grand-

• “great-, prefix”, in Cambridge English Dictionary, Cambridge, Cambridgeshire: Cambridge University Press, 1999–present.
• “great-, prefix”, in Collins English Dictionary.

• 'Gater, Gater, Greta, ergat-, grate, retag, targe, terga