Your father's sister is your Aunt.
your second cousin
"Relationship to you" means who are they to you, or how do they fit in to your family circle. be they your paternal aunt,(fathers sister) maternal aunt (mothers sister) maternal grandmother (mothers mother) paternal grandfather (fathers father). and so forth.
"Relationship to you" means who are they to you, or how do they fit in to your family circle. be they your paternal aunt,(fathers sister) maternal aunt (mothers sister) maternal grandmother (mothers mother) paternal grandfather (fathers father). and so forth.
She is a half-sister.
Maternal name means the mothers name. Paternal means the fathers name.
Anne's sister was named Margot Frank. Her father was named Otto Frank.
Let's see if we can unravel this. Your sister's husband's father's brother is your sister's husband's uncle. The uncle's daughter is your sister's husband's cousin. There is no relationship to your sister, unless your sister wants to call her a cousin-in-law. To break it down to its simplest terms: She is your brother-in-law's cousin and no relationship to you.
sister in law
Niece
Your wife's sister would be your sister-in-law.
Sister-in-law. same as your brother's wife.
Your sister's son is your nephew.