Board Thread:General Discussion/@comment-27057904-20160504042316/@comment-27611520-20161222225533

I'd say it's pretty clear based on the numbering:

No. 1 - Legendary (Kusanagi?)

No. 21 - Onimaru Kunitsuna (Awataguchi)

No. 63 - a Muramasa

No. 75 - an Osafune

No. 77 - either another Osafune or a Samonji

No. 121 - Doujigiri Yasutsuna

No. 140 - wildcard, I guess