I see, that makes perfect sense. We also call our cousins from our dad's brothers as brother and sisters because we all have the same surname. And likewise, we have 7 different names for the 8 aunties depending on the relationship to us. Only the wives of our mother's brothers are called the same. We call all other aunties different names depending on whether they're younger or older than our mum or dad, and whether they're a sibling or married to a sibling.

So yours is not too complex, don't worry😄. It may sound so for other westerners where aunty and uncle is a catch all name for everyone. But I think our and your system is much clearer, and we know immediately how people are related.

Let's go and confuse them all now 🤣