grampuncle 

Your grandpa/grandma’s brother who is the uncle of your mom/dad ;)

Kris: Hello grampuncle
Josh: Hello

grampuncle by Jjk1293 January 24, 2018

granduncle-in-law 

1. The husband of one's grandparent's sister.
2. The brother of one's grandparent-in-law.

My granduncle-in-law is a good person.

granduncle-in-law by Elivaldeq November 24, 2019

co-granduncle-in-law

Spouse's grandpibling's husband.

My co-granduncle-in-law is a good person.

co-granduncle-in-law by Wonbig October 13, 2021

granduncle

Grandparent's brother.

My granduncle is a good person.

granduncle by Mr. Jacov November 23, 2019

granduncle-in-law 

1- Grandaunt's husband.
2- Spouse's granduncle.

My granduncle-in-law is a good person.

granduncle-in-law by Gerald128 April 7, 2021

granduncle-in-law 

1- Grandpibling's husband.
2- Spouse's granduncle.

My granduncle-in-law is a good person.

granduncle-in-law by Wonbig October 13, 2021

granduncle-by-marriage 

Grandpibling's husband.

My granduncle-by-marriage-in-law is a good person.

granduncle-by-marriage by NSBC968755 February 25, 2023