More on Septs

[Blackrose87]

Cluny has always maintained that the word sept is an Irish Gaelic word meaning 'clan' or 'family' and in Scottish Gaelic, clan translates to 'children,'

I'm not too sure about that. In Irish family is 'teaghlach', and children is 'clann'. Although clann can be used for family as well.
Sometimes 'cúram' is used for family or children (or business, or responsibilities)

But I dont think sept is used, at least not in modern Gaeilge. I had a check in my dictionary to be sure, and it's not in there.