Prior to their service in the Maelstrom, the Astral Claws were a fleet based chapter, and their specific founding is not entirely clear. The records of their parent chapter have been lost, so they start with an air of mystery. The money bet for the chapter is sadly that they are Ultramarines, owing to their blue heraldry, Roman aesthetic, and codex adherence. Some link the chapter's Lion heraldry to the Dark Angels, but since they have no inner circle and don't pass on the story of the Unforgiven, it seems unlikely they were a successor as such. Whatever the source material, the Claws at some point spawned a few sucessor chapters, of which only one is named, the Tiger Claws.
The current version of the Tiger Claws paint scheme
The Tiger Claws are an interesting side portion of the story, their role perfectly fits into the fall from grace story. The Astral Claws were