I'm putting these down from memory, but I'm pretty sure they're correct.

Father-names:
1. Nelyafinwë, lit. "Third-Finwë"
2. Canafinwë, lit. "Commanding Finwe"
3. Turkafinwë, lit. "Strong Finwë"
4. Morifinwë, lit. "Dark Finwë"
5. Curufinwë, lit. "Skilled Finwë", same as Feanor's own name
6. Pityafinwë, lit. "Small Finwë"
7. Telufinwë, lit. "Last Finwë"

Mother-names:
1. Maitimo, "well-shaped one"
2. Makalaurë, "forging gold". Note: this is not gold the metal, but gold the colour. No, I don't know what it means either.
3. Tyelkormo, "hasty riser"
4. Carnistir, "ruddy face" or something like that. Sorry.
5. Atarinkë, "little father"
6&7 Ambarussa, the meaning of which I'm not sure. If you're going with the version where one of them died at Losgar, then one's Ambarto and one's Umbarto, like Mitani said. Otherwise, just Ambarussa.

The seven also had nicknames (canon nicknames! *swoon*). You might want to use these because it's most likely what they'd have called each other in Aman. Especially for Curufin, because both of his other names are inconvenient.

1. Nelyo
2. Káno
3. Turko
4. Moryo
5. Kurvo
6. Pityo
7.Telvo

You might also want to change the Ks to Cs for stylistic reasons, but that's up to you. AFAIK, they didn't have other kids.