Hristos is a male Greek name, same as Christos. Both in Greek and Latin alphabet there are alternative spelling types for the same name, thus you can find name Christos also spelled as Hristos, which is closer to the original sound of the name in Greek.
Sound of name Hristos: Hreé-stos
Female Version of name Hristos: Hristina
Nameday of Name Hristos: 25th of December
Additional information about name Hristos can be found at the pertinent post for the name Christos.