Caïn is a male name.
Caïn is a French variant of the Hebrew name Kain. In Germany, it is forbidden to name your child Kain, because it’s a negative name. Kain was the first son of Adam and Eve and killed his brother Abel.
The meaning of Caïn is not clear. Caïn could mean “acquired” (from Hebrew “qnh” = to acquire), but as well “spear”, “craftsman”, “smith” or “minister”, “administrator”.