Where does “má” come from?

má (Old Norse) comes from Old Norse mega, from Proto-Germanic maganą, from Proto-Indo-European (me)mógʰe, from Proto-Indo-European megʰ- — to be able.

Ancestry of “má”, step by step

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

Words derived from “má”

Every word from Proto-Indo-European megʰ- →Every word from Proto-Indo-European (me)mógʰe →Every word from Proto-Germanic maganą →