Re: some adults in the clan
Pretty much all I know about clans is from reading highly fictionalized romance novels set in the Scottish Highlands in the 1700. Like Tullia, I may say something like "the family reunion was a lot of fun - pretty much the whole clan was there" to simply mean extended family - aunts, uncles, first cousins, children of first cousins, etc. It does not have a strict bundary.And last names don't help, since daughters of a generation ago usually changed their names when they go married. And then I went and married someone with my last name but I assure you, are not related!
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.