The granddaughter-in-law of one's spouse's sibling.
My co-great-niece-in-law is a good person.
by Elivaldeq November 24, 2019
Get the co-great-niece-in-lawmug. 
Get the co-niece-in-lawmug. My niece-in-law is a good person.
by Wonbig October 13, 2021
Get the niece-in-lawmug. by Mr. Jacov November 23, 2019
Get the first cousin-niecemug. The daughter-in-law of one's spouse's sibling.
My co-niece-in-law is a good person.
by Elivaldeq November 24, 2019
Get the co-niece-in-lawmug. 
Get the step-co-niece-in-lawmug. 