Story Help

[http://users.livejournal.com/_xasphyxiax_/]

So I am writting this story and suddenly I decided to revamp it all and was left with 4 main characters and other 2 revelant ones and no names for them! So I decided to ask you lovely people for help.
The characters are siblings so it needs to be a nice sibset and they go as followed

1. Older brother: ???? ???? (I have no idea what to name him, not a first or middle name)
2. Twin girl: Abigail Clara (I decided to keep this characters name because the character doesn't change much)
3. Twin boy: ???? ??? (something that goes with Abigail Clara would be nice, like same initials or just names that go really good together)
4. little sister: Molly ???? (I am having a hard time finding a middle name for her)

Mother: Clair Vivina (nn Viv (VEE-v)
Father: ???? ??? (was thinking that his name and the first son's name can be related somehow)

Oh, the lastname I have for them right now is Sander but if you have a better opinion please tell me =)

Thanks and sorry for posting so much!