Where does “Taija” come from?

Taija (Finnish) comes from Finnish Taina, from Russian Татья́на, from Latin Tatiana, from Latin Tatianus, from Latin Tatius.

Ancestry of “Taija”, step by step

Step	Language	Word	Meaning
1	Finnish	Taina	—
2	Russian	Татья́на	Tatiana
3	Latin	Tatiana	—
4	Latin	Tatianus	—
5	Latin	Tatius	—

Taija — Etymology, Origin & Word History | Etymology Explorer