I would pronounce it HERR-mee-ah. Another option is Herr-MEE-ah. But I am sure it would not be pronounced as Her-MY-uh in German.
The letter I is pronounced as EE in most languages, in fact every language I know, except English.
"You sought a flower and found a fruit. You sought a spring and found a sea. You sought a woman and found a soul. You are disappointed." "It does not become me to make myself smaller than I am." (Edith Södergran 1891-1923)