...is not "orc-zy", but "ortsey". I have been mispronouncing it for quite some time now. Oh, the shame!
Her full name is technically Emma Magdolna Rozália Mária Jozefa Borbála Orzcy de Orczi (what a mouthful!) However, she often went by Emmuska, which means "little Emma". Pronounced "em-moosh-ka", by the way.
And no, as her name suggests, she was not of English birth, but Hungarian.