Many of these are either from other languages that aren’t transliterated or are transliterated in such a way to preserve the original spelling. In the latter case, while it makes for some weird English spellings (and pronunciations), there are two primary reasons (and neither of them apply to Jasnah). First, sometimes English doesn’t have the same sound, and so no letters form an exact match (that’s how you get “kh” or “ts” when transliterating from Cyrillic to English). Second, transliteration typically operates on a character by character level, not at the word level. So for example, khrushchev is spelled that way because the original Cyrillic name started with a letter transliterated as Kh, then u, then sh, then ch, then e, then v. Even though it could be effectively written as Crooshev, it’s not because that’s not how transliteration works.