Firestar- Sandstorm
Squirrelflight and Leafpool
Leafpool-Crowfeather
Jaykit Hollykit Lionkit
Lionblaze-Cinderheart (this is a little make-believing because it doesn't talk about their kits)
Vinekit Applekit Beetlekit
Vinefang-Dapplenose(Tigerheart's daughter in ShadowClan, related to Tigerstar) Applefall-Robinclaw
Hollykit Quailkit(Went to ShadowClan) -----------------------------------------------Yewkit Pinekit Sagekit
Hollyheart(sound familiar)-Seedtail ---------------------------------Pinetail-Kate(kittypet) ------Sagefrost-Thrushfeather
Lionkit Shrewkit Poppykit -----------------------Blazepaw(Kittypet who joined ThunderClan) Foxkit Breezekit
Poppytail-Sparrowstrike
Bumblekit Shadowkit

(Back up to Vinefang and Dapplenose(Tigerheart's daughter), their kit Quailkit who went to ShadowClan)
Quailfeather-Hazelmist
Gingerkit Lizardkit Jaykit
Lizardtongue-Moonfrost
Rotkit (littermates deceased)

(Remember things like that Lionkit(Lionflame) and his littermates are still obviously older then Foxkit and Breezekit(who died as an apprentice))