half-great-great-great-grandnephew 

Half-sibling's great-great-great-grandson.

My half-great-great-great-grandnephew is a good person.

half-great-great-great-grandnephew by Seo48787 October 28, 2021

great-great-grandnephew 

Sibling's great-great-grandson.

My great-great-grandnephew is a good boy.

great-great-grandnephew by Hgcloziw November 23, 2019

great-great-grandnephew-in-law

1- Great-great-grandniece's husband.
2- Spouse's great-great-grandnephew.

My great-great-grandnephew-in-law is a good person.

great-great-grandnephew-in-law by JAMP12 September 21, 2021

great-great-grandnephew-in-law

1- Great-great-grandnibling's husband.
2- Spouse's great-great-grandnephew.

My great-great-grandnephew-in-law is a good person.

great-great-grandnephew-in-law by Wonbig October 13, 2021

great-great-grandnephew 

Sibling's great-great-grandson.

great-great-grandnephew.

great-great-grandnephew by Simaduria July 26, 2024

half-great-grandnephew 

Half-sibling's great-grandson.

My half-great-grandnephew is a good person.

half-great-grandnephew by Gtopql November 23, 2019

step-great-grandnephew 

1- Sibling's step-great-grandson.
2- Stepsibling's great-grandson.

My step-great-grandnephew is a good person.

step-great-grandnephew by User655 July 25, 2021