Where does “Raitis” come from?

Raitis (Finnish) comes from Proto-Germanic raidaz, from Proto-Indo-European h₂reh₁dʰ- — to care.

Ancestry of “Raitis”, step by step

Step	Language	Word	Meaning
1	Proto-Germanic	raidaz	ready, arranged, prepared
2	Proto-Indo-European	h₂reh₁dʰ-	to care

Raitis — Etymology, Origin & Word History | Etymology Explorer