@SunSun I mean, your question wasn't very well-written either, nor was your research clearly presented. I was just trying to be helpful by offering insight into the problem.
Now that some proper definition has been given, and prior research demonstrated, the question makes a lot more sense. You're asking what relation to your mother's brother-in-law's daughter (or mother's brother's daughter's mother's brother's daughter).
Anyways, since you're being snarky when someone tries to help you, just complete the research on your own since that'll be faster and less triggering than trying to use a comments section to get accurate information.