Taira no Kagekiyo is from Genpei Tōma Den and was in Namco X Capcom.
http://en.wikipedia.org/wiki/Genpei_T%C5%8Dma_Den
Zankuro Minazuki is from Samurai Spirits: Zankurō Musōken.
http://en.wikipedia.org/wiki/Samurai_Shodown_III
Both of them were swordsmen, who had great skill.