I have been pronouncing OTMA with a short O and a short A, but recently my Grandma pronounced it "oht-ma" and i'm wondering, since Olga is not pronounced with a short O, is OTMA pronounced "oht-ma"? or, going with the first letter sounds of OTMA's names, "oht-maa"? the last one sounds horrid, but is that how it is supposed to be prounoced? Or do you just say "O-T-M-A", not saying it as a word, but spelling it out?
Also, not conected with the Romanovs as far as I know, but Russian: how do you pronounce "Marya", the Russian form of Mary?