* A variant spelling of "Taisia": This name is of Greek origin and means "divine" or "worshipper of God". It's also a popular name in Russia and Ukraine.
* A shortened form of other names: It could be a nickname for names like Tatiana, Theresa, Taisha, etc.
* A unique, made-up name: It's possible that "Taisa" is a name chosen by parents without a specific meaning.
Without further context, it's difficult to determine the exact meaning of "Taisa."