oh my god i love these so much they're my life source rn i love aus so so so much and theories thank you you've saved me
Antfur
Antfur looks like he's descended from Fernshade, Tallpoppy, Newtspeck, Mossfire, Olivenose, Ratscar, Dusk Nose, Ripplestar, both Snaketails and Dew Nose (also while I'm on the topic of Dew Nose, their wiki ref is flawless). He's probably an ancestor to Cinnamontail, and hey, maybe Sunbeam.
Blizzardstar
I love deciding the ancient leaders' lineages... it's so fun. Here comes a bunch of white/grey cats!
Descendants: Blackstar, Blizzardwing, Blossomkit (ShC), Bluebellkit, Needletail, Cloudpelt, Cloverfoot, Conefoot, Ferretclaw, Flowerstem (AVoS), Gullswoop, Harelight, Icewing, Lavenderkit, Lilyfur, Maggottail, Roach, Runningnose, Rubblekit, Sagewhisker, Snowbird, Snowtuft, Spiderfoot, Stonewing, Swampkit, Talonpaw, Whitewater, Whorlpelt
Ancestors: Moth Flight
Unsure due to unclear timeline: Snowstar, Lilystar
Brightwhisker
OHHHH I LOVE BRIGHTWHISKER!!!! I see her as a Blazefire ancestor, to be honest. I hope Brightwhisker makes another appearance... a Cinnamontail ancestor too, maybe? Ohhh and Dawncloud that'd be so cool!!
Brindlestar
Nightwing, Needletail, Palefoot, Poolcloud, Darktail (yes the guy leading the kin), and the Yellowfang family strike me as being descendants of Brindlestar. Pretty cool name. I hope the Erins decide to take some random leader that hasn't been explored at all (HEATHERSTAR HEATHERSTAR HEATHERSTAR HEATHERSTAR) and make a Super Edition with them. Some of the unexplored leaders need some serious... well, exploring.
Dangling Leaf
I've been trying to keep this strictly ShadowClan cats, but I can't help but sneak in Rosetail for this one. Look at him. And then look at Rosetail. It's just perfect!! I hope Rosetail's character gets explored more soon... Anyways I, for some reason, see all the cats with tails differently coloured to their main pelts as related. Don't know why. So yes, Darktail, you're lumped into this too.
Dawnstar
Sometimes names just make me think cats are related. Dawn Mist, Dawn River, you're ancestors of this cat now, congratulations. Dawnpelt, Dawncloud, Dawnflower, Dawnstripe, Dawnbright (wow i've literally never heard of some of these cats before), Dawnfeather, you're all descendants of Dawnstar. Congrats. This is the price to pay for having your prefix shared with some random leader of ancient ShadowClan that has a boring reference image.
Driftkit
Ohhh boy! Driftkit! What a cutie! Well, Whorlpelt's definitely one of his descendants. Jay's Wing is definitely an ancestor. And sure, I'll throw in Echosong and Cloudstar. And Willowshine. And Whistlepaw. And Featherpelt.
Dusk Nose
Pinestar ancestor within close proximity has been detected.
And Hal. And Boulder. Don't ask where I got Boulder from, I'm not entirely sure. Nightcloud maybe? I'd like Nightcloud to be explored beyond her relationship with Crowfeather and Breezepelt, as well as her hatred for Leafpool. Sedgewhisker's also definitely a descendant. And I'll throw in Oatclaw too.
[not gonna include fallowkit bc fallowkit is driftkit's sister]
Flowerstar
Oh I love Flowerstar. For no reason. Anyways, TOTAL Blazefire ancestor. There's no denying it anymore Blazefire is definitely descended from a bunch of cool leaders with potential. Also Flowerstar is now an ancestor to Brightflower, Nettlespot, Redwillow, Foxheart, Scorchwind, Snaketooth (ShC), Starlingwing, Spottedpaw (ShC), Houndstar, Ivytail, Sunnytail, Jaggedtooth, Littlebird, Tangleburr, Volewhisper, and Yarrowleaf's family.
Hollowbelly
Crowtail, Yellowfang family, Whitethroat, Blackstar, Mistcloud, Mosspaw (ShC), Cinderfur, Darkflower, Crowfrost, and Hollyflower are all descendants of Hollowbelly
I think Juniper Branch is a Hollowbelly ancestor.
Hollystar
Oh, who better to finish this list off with than someone who shares the first name and probably appearance with so many different cats?!
Hollyflower, Crowfeather (so yes Hollyleaf too), Juniperclaw, Kinkfur, Finchflight, Sloefur (ShC), and Jumpfoot are descendants of Hollystar.
Holly, Juniper Branch, Sun Shadow, Jackdaw's Cry, Cloud Spots, Shaded Moss, Silver Frost, Falling Feather, Falling Dusk, and Jagged Peak are ancestors of Hollystar.