Where does “Mariitta” come from?

Mariitta (Finnish) comes from Swedish Marita, from Norwegian Marita, from Norwegian Marit, from Norwegian Margareta — Margaret.

Ancestry of “Mariitta”, step by step

Step	Language	Word	Meaning
1	Swedish	Marita	—
2	Norwegian	Marita	—
3	Norwegian	Marit	Margaret
4	Norwegian	Margareta	Margaret

Mariitta — Etymology, Origin & Word History | Etymology Explorer