As of yet, Lionblaze has no kits.
Hollyleaf's and Lionblaze's mother is Leafpool, a ThunderClan medicine cat. Leafpool has three kits with Crowfeather: Hollyleaf, Lionblaze, and Jayfeather.
Leafpool.
Leafpool and Crowfeather
Leafpool and Crowfeather.
No one knows for sure, but Vicky revealed on Facebook that Icecloud will be his mate. I think. So if he has kits, it will most likely be with her. Icecloud did have a crush on him, after all. That was just a rumor. Lionblaze is in love with Cinderheart and Erin Hunter revealed that Cinderheart WILLL have kits in the next book or maybe the one after.
No, she has kits with fireheart.
As of the forgotten warrior- He no longer loves Heathertail, if anything he was dreaming about killing her and he said himself he loves Cinderheart but Cinderheart is afraid to become his mate due to the PO3 prophecy but when she realizes she is Cinderpelt and after a talk with Jayfeather she decided that she will become mates although that was the end of the forgotten warrior so it is unknown if they are mates yet.
Brambleclaw has no kits biologically, since it has been revealed that Squirrelflight did not bear him kits; instead, the kits were her sister Leafpool's. However, his adopted kits (the aforementioned kits) would be Jayfeather, Lionblaze, and Hollyleaf (presumed deceased).
Spiderleg has three kits named Rosepetal, Toadstep, and Daisypetal.
Dovewing and Foxleap do not have kits together, nor become mates.
Moonflower's kits are Bluestar and Snowfur.
Who are Fire Stars kits