Where does “ում” come from?

ում (Armenian) comes from Old Armenian ում, from Old Armenian ով, from Ancient Greek ὦ, from Ancient Greek μέγα — greatly; mightily; loudly.

ում (Armenian): whom

Definitions

Step	Language	Word	Meaning
1	Old Armenian	ում	dative singular of ո; locative singular of ո;...
2	Old Armenian	ով	who?; who, that, he that, whoever
3	Ancient Greek	ὦ	oh!; ah!; Very commonly used before a noun in the...
4	Ancient Greek	μέγα	greatly; mightily; loudly