Nibling-in-law (only spouse's nibling).
My nibling-by-marriage is a good person.
by QWP998756 October 15, 2021
Get the nibling-by-marriagemug. 
First cousin's grandchild.
by Hgcloziw November 23, 2019
Get the first great-cousin-niblingmug. My sesqui-cousin-nibling is a good person.
by Hgcloziw November 23, 2019
Get the sesqui-cousin-niblingmug. Child of a paternal half-sister with maternal half-brother or child of a maternal half-sister with paternal half-brother.
My double-half-nibling is a good person.
by Hgcloziw November 23, 2019
Get the double-half-niblingmug. 
Get the great-great-niblingmug. 
Get the nibling-by-marriagemug.