double-1C2R

Double-first-cousin-twice-removed: child of their great-grandparent’s full sibling with the other great-grandparent’s full sibling or grandchild of their maternal first cousin with the paternal first cousin or double-first cousin’s grandchild or child of their parent's grandparent's full sibling with the other parent’s full sibling's grandchild or child of their parent's parent's sibling's child with the other parent’s sibling's child's child.

My double-1C2R is a good person.

1C2R

First-cousin-twice-removed.

I don't know my 1C2R.

1C2R

First-cousin-twice-removed.

My 1C2R is a good person.

sesqui-1C2R

Sesqui-first cousin-twice-removed: child of their great-grandparent’s full sibling with the other great-grandparent’s half-sibling or grandchild of their parent’s full sibling's child with the other parent’s half-sibling's child or sesqui-first cousin’s grandchild or child of their parent's grandparent's full sibling with the other parent’s half-sibling's grandchild or child of their parent's grandparent's half-sibling with the other parent’s full sibling's grandchild or child of their parent's parent's half-sibling's child with the other parent’s sibling's child's child or child of their parent's parent's sibling's child with the other parent’s half-sibling's child's child.

My sesqui-1C2R is a good person.

co-1C2R-in-law

Spouse's first-cousin-twice-removed's spouse.

My co-1C2R-in-law is a good person.

half-1C2R

Half-first cousin-twice-removed: grandparent’s half-cousin or half-cousin’s grandchild.

My half-1C2R is a good person.

1C2R-in-law

1- First-cousin-twice-removed's spouse.
2- Spouse's first-cousin-twice-removed.

My 1C2R-in-law is a good person.