"Remember I said Finwë had three sons? Well, the third married my cousin Earwen of Alqualondë, and his children are half Lindar. Finrod, Angrod, Aegnor, Galadriel. They're the Noldo King's nephews so he gave them kingdoms too - well, the boys - and they didn't take part in the Kinslaying except Galadriel who fought to defend our people, so they're allowed into Doriath. Finrod's kingdom is Nargothrond, Angrod and Aegnor rule Dorthonion together, and they've also got human vassals in Ladros.
The Feanorians have their humans in Estolad, that's here, and more humans sometimes cross the mountains and of course run into them first. The Feanorians on Doriath's eastern border are Celegorm and Curufin, that's number three and number five, and south is Amrod, number six, and east of that's Caranthir, number four, and Maglor's next to Maedhros in the hills here.
You might notice that's six. They don't say what happened to the seventh but Galadriel thinks his father had him killed."