Extended family

Australian aboriginal languages have names for an extremely wide extension of the family. When speaking English, aboriginal people refer to all the ones that the English language has no name for, as uncles, aunts or cousins. The system is complicated by other intricate rules of kinship, such as skin and totem.

Spanish has specific terms for a fairly extended part of the in-laws, at least compared to English: cuñado/cuñada (brother/sister-in-law), concuño/concuña (brother/sister of your brother/sister-in-law), nuera (daughter-in-law), yerno (son-in-law), suegro/suegra (father/mother-in-law), consuegro/consuegra (your son or daugther's father/mother-in-law).

not so much extended family, but as for specific family terms, malayalam (and i would guess a lot of other langauges too) traditionally has different words for many relatives depending on age and the exact relation. so the word for aunt, for example, would be different depending on whether she is the mother's younger or older or the father's younger or older sister (so there are four words). and then those words are also different for hindus, christians, and muslims. these days, however, a lot of people seem to use english words like "auntie"...

Seeing palindroma's reference to consuegro/consuegra (a son or daughter's father- or mother-in-law) reminded me that Russian has a term for that relation also; I'm sorry to say I don't remember what it is. My grandmother was talking to my mother about someone, and she used a term I didn't know. When I asked who she was referring to, she said it was my uncle's father (her daughter's father-in-law).

I am sure that Hindi would have the most names for family members, so bear with me ----
Father's older brother -- tatu
Father's older brother's wife -- tai
Father's younger brother (uncle) -- cha cha
Father's younger brother's wife (aunt) -- cha chi
Father's sister (aunt) -- bua
Father's sister's husband -- Phupha
Mothers brother -- mama
Mother's brother's wife -- mami
Mother's sister -- mausi
Mother's sister's husband -- massad
Brother's son -- (nephew) -- bhanja
Brother's daughter (niece) -- bhati
Father -- pita or baap
Mother -- Mata
Paternal grandfather -- Dada
Paternal grandmother -- dadi
Maternal grandmother -- nani
Maternal grandfather -- nana
Brother -- bhai
Brother's wife -- bhabi
elder brother -- bhaiya
Younger brother -- chota bhai
Sister -- bahin or bahen
Sister's husband -- bahanai
Elder sister -- didi
Younger sister -- choti behen
Son -- beta
Daughter -- beti
Husband -- pati
Wife -- patni.

There are many more -- to the point of exhaustion !!!