There is no real blood relationship, as you do not share a common ancestor. You could refer to him as your grandson-in-law. It is probably easier just to call him by name and explain that is your granddaughter's husband.
Your granddaughter's husband is your grandson-in-law.
He is your grandson by marriage or grandson in-law.
Your grand daughter's husband is your grandson-in-law.
He is your grandson by marriage or grandson in-law.
Technically there is no relationship. When introducing her, you would refer to her as My daughter's mother-in-law.
No relation...lol
Your daughters husband is you son-in-law.
Zara Phillips - she is the daughter of Princess Anne and her first husband, Mark Phillips.
No. The sister is a relation, and her husband is an in-law. The husband's brother is no biological relation either. Therefore, the great granddaughter of the husband's brother is not a relation.
He is of relation as a cousin-in-law.
Your cousin-in-law.
There is none.
Your husband's grandniece is your grandniece-in-law.
He is technically no relation, as you do not share a common ancestor. He is your husband's first cousin once removed.