Where does “mei” come from?

mei (North Frisian) comes from Latin Māius, from Latin Maia, from Ancient Greek μαῖα, from Ancient Greek μήτηρ, from Proto-Hellenic mā́tēr, from Proto-Indo-European méh₂tēr — mother.

mei (North Frisian): May

Definitions

Ancestry of “mei”, step by step

mei traces back through two separate lines of ancestry.

via Latin Māius

Step	Language	Word	Meaning
1	Latin	Māius	“month”}} of May
2	Latin	Maia	nominative feminine singular of Maius; nominative...
3	Ancient Greek	μαῖα	midwife; foster mother, nurse; good mother, dame
4	Ancient Greek	μήτηρ	mother; source or origin
5	Proto-Hellenic	mā́tēr	mother
6	Proto-Indo-European	méh₂tēr	mother

via Proto-Germanic maganą

Step	Language	Word	Meaning
1	Proto-Germanic	maganą	to be able, may
2	Proto-Indo-European	(me)mógʰe	to have power, to be able to
3	Proto-Indo-European	megʰ-	to be able

Every word from Proto-Indo-European méh₂tēr →Every word from Proto-Hellenic mā́tēr →Every word from Ancient Greek μήτηρ →