Fifth-cousin-once-removed (5C1R).
My fifth-cousin-1X-removed is a good person.
Spouse's step-first-cousin-once-removed's spouse.
step-co-first-cousin-once-removed-in-law.
First cousin's great-grandson.
My first great-great-cousin-nephew is a good boy.
Son of their grandparent’s half-sibling with the other grandparent’s full sibling.
My sesqui-cousin-uncle is a good person.
1- First-cousin-once-removed's spouse.
2- Spouse's first-cousin-once-removed.
3- 1C1R-in-law.
My first-cousin-once-removed-in-law is a good person.
1- First-cousin-once-removed's spouse.
2- Spouse's first-cousin-once-removed.
first-cousin-once-removed-in-law.