hmmmm.. I feel like making a V6 family because we had one last version. I hope this topic gets popular  Anyway The options are:
Mum: DjDazzy2011..?
Dad: KingTaco130
Sister: Me! (DreamCatcher898)
Sister #2: AnnabethChase88
Sister #3:
Crazy Brother: DrewG2001
Awesome Brother: Xavier1964
Brother #3: XxiBENNixX
Dog: FlammableCow800
Cat: Brianta101
Grandma:
Grandpa: HarryX11
Aunt:
Aunt #2:
Cool Uncle: Josh_Apple
Creepy Uncle #2: nebih
Uncle #3:
Step Brother:
Step Sister:

That's the options for now. I'll add to it if there's something you want to put in but it has to be sensible.
Fictional Character: xXAnimeOXx
Sister's Boyfriend: mysterymilk
Insane Little Girl..?: edixsabourin
Sporty Member: matanatr96
Family Pet Monkey: Miner_man123456
The Antisocial Neighborly Cat Person: Halcyon13

And as Water's words: I just want to let you know that if any parts of this 'family' includes role-play, could you please keep it to the Local chat, /tell or /party when you are online, some users can get annoyed by roleplaying in the global channel and it can sometimes cause spam.