Origin: Latin, Japanese
Meaning: it could be a feminine form of Sol meaning "sun" in Latin.
It could also come from Latin sola meaning "alone".
It's also a Catalan surname also derived from Latin sol meaning "sun", derived as a habitional surname from places called Sola referring to a place exposed to the sun. It could also be an occupational surname for a shoemaker from Latin solea meaning "sandal, bottom of a shoe".
Sola is also close in pronounciation to sora, a Japanese word and unisex name meaning "sky", and has sometimes been romanized as such.