This video summarizes the family relationships that these variables represent: https://www.youtube.com/watch?v=nCFRoILS1jY https://www.youtube.com/watch?v=nCFRo

This video summarizes the family relationships that these variables represent: https://www.youtube.com/watch?v=nCFRoILS1jY https://www.youtube.com/watch?v=nCFRoILS1jY People really do use these relation names instead of given name. Everyone in the family using different names, which is confusing to watch as an outsider as you can't learn their given names. It would be like watching everyone else in a family refer to a single person as "sister", "cousin", "niece", "aunt" etc. No-one uses their given name so you as an outsider aren't sure what to call them.