Auncle

By cross-cousin marriage, the parents-in-law are auncles (mother’s brother, father’s sister), but since we appear to have a Lukian term nere for parents-in-law but another, tuhe, for auncles, the Lukian relationship terms do not seem to be based upon a cross-cousin system.

Source: wiktionary

And if we are considering all logical possibilities (or anyway all that we can manage to think up), and then assigning equal initial a priori probabilities to each, then should we not divide those having siblings with a child into uncles, aunts, auncles′, auncles″, auncles‴,…, etc., ad infinitum, where we distinguish between the aunclesⁿ(‴…) in whatever way we care to imagine?

Source: wiktionary

“Do you think we might have more than one child?” he ventured. After all, she was the one who’d have to bear them. / “Yes, I think so. You know the way Mum and LeeLee are, and Kris and Alex. Maybe a bit closer together might be good though, so we don’t end up with auncles only a little bit older than nevvies.” / “What and which?” / “Auncles?” / “And neivies” / Her face cleared. “Oh—you don’t use those words. They’re like sibling or parent. Non-specific.”

Source: wiktionary