Board Thread:General Discussion/@comment-24882930-20160409075351/@comment-27565137-20160412181930

How about Yachiru? Yes. The name of his bankai.

The original Yachiru from whom Zaraki took the name to give to her was 八千流 = Eight Thousand Flows. After all we learned from Yama-san that not every bankai name has to be a variation of the shikai name.