I was thinking about labels we assign family members (like cousin, grand mother etc.) and it struck me that in my native language of Hindi, we have different labels for maternal and paternal family members. For example, your maternal grandmother is a "naani", while your paternal grandmother is a "daadi". This feature isn't present in the English language, and you'd probably refer to both as your "grandmother".
Similarly there in Chinese there is also specificity for elder and younger brother ("Didi", and "Gege"). However, I've not seen such specific family position labels in English (or Italian).
I was wondering if this feature has developed because both China and India have joint-family oriented societies, and thus it is more efficient to have unique words for each member. More specifically however, I was wondering if there was any research done in this topic.
I tried my best to search for the answer. But researching this topic has proven more challenging then I expected. Besides, I don't think I have the vocabulary or linguistics knowledge to even begin clearly describing my question or search for the right keywords.
Here are some relevant links I found:
I apologize in advance for the broad nature, and my lack of ability in being able to cleanly explain my question.