The granddaughter-in-law of one's spouse's sibling.
My co-grandniece-in-law is a good person.
by Elivaldeq November 24, 2019
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Spouse's great-grandnephew's wife.
My co-great-grandniece-in-law is a good person.
by JAMP12 September 21, 2021
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Spouse's great-great-grandnephew's wife.
My co-great-great-grandniece-in-law is a good person.
by JAMP12 September 21, 2021
Spouse's great-great-grandnibling's wife.
My co-great-great-grandniece-in-law is a good person.
by Wonbig October 13, 2021