Uncle
삼촌 (if he's not married)
큰아버지 (if he's married and older than your father)
작은아버지 (if he's married and younger than your father)
이모부 (if he married with a sister of my mother)
고모부 (if he married with a sister of my father)
Aunt
숙모 (Generally)
큰어머니 (if she's 큰아버지's wife)
작은어머니 (if she's 작은아버지's wife)
이모 (if she's a sister of your mother)
고모 (if she's a sister of your father)
Niece, Nephew
조카
Cousin
사촌 형/누나/오빠/언니 (elder cousins)
사촌 동생 (younger cousin)
이종사촌 (if they are children of 이모)
고종사촌 (if they are children of 고모)
Brother's wife :
형수(for men addressing elder), 제수(for men addressing younger)
새언니(for women addressing elder), 올케(for women addressing younger)
Sister's husband :
매형(for men addressing elder), 매부(for men addressing younger)
형부(for women addressing elder), 제부(for women addressing younger)
Nephew's wife : 질부
Family in law : 사돈
Husband's family
Father in law : 시아버지
Mother in law : 시어머니
Husband's elder brothers :
시숙(title), 아주버니(for addressing)
Husband's elder sisters :
시누이(title), 형님(for addressing)
Husband's brother's wife :
동서(title), 형님(for addressing elder), 동서(for addressing younger)
Husband's younger siblings : 시동생(title)
도련님(for addressing unmarried younger brother)
아가씨(for addressing unmarried younger sister)
Wife's family
Father in law : 장인
Mother in law : 장모
Wife's brothers : 처남
Wife's sisters : 처형(older), 처제(younger)
Hope this helps!
