Complex sentence: Clan MacNaucht of Kilquanity is a branch of Clan Macnaghten (sometimes spelt as MacNachten or MacNaughton), and, therefore, an off-shoot of a Highland Scottish clan.
Split into simpler sentences: Clan MacNaucht of Kilquanity is a branch of Clan Macnaghten (sometimes spelt as MacNachten or MacNaughton). Consequently, Clan MacNaucht is an off-shoot of a Highland Scottish clan.