co-uncle
Your brother's or sister's brother-in-law, or your niece's or nephew's other uncle(s) that aren't your brothers.
Jonathon and I aren't blood related, as his sister married my brother, but we are co-uncles to Jack and Caroline.
half-co-uncle-in-law
Spouse's half-pibling's husband.
My half-co-uncle-in-law is a good person.
co-cousin-uncle-in-law
The son-in-law of one's grandparent-in-law's sibling.
My co-cousin-uncle-in-law is a good person.
co-great-uncle-in-law
The husband of one's grandparent-in-law's sister.
My co-great-uncle-in-law is a good person.
step-co-uncle-in-law
Spouse's steppibling's husband.
My step-co-uncle-in-law is a good person.
co-uncle-in-law
Spouse's aunt's husband.
My co-uncle-in-law is a good person.
co-uncle-in-law
Spouse's pibling's husband.
My co-uncle-in-law is a good person.