{magjaro} (among other possibilities) is proposed here:
<
http://www.lojban.org/tiki/tiki-index.php?page=Names%20of%20Languages>
Personally, I don't mind using "unofficial gismu" for culture
words for cultures that have at least one Lojbanist, so maybe
{madjo}, or propose one you like better. I use {norgo} for
Norwegian, {talno} for "Italian", {turko} for "Turkish",
{xorvo} for "Croatian"... all unofficial.
Well, if I really had a choice, I would immediately cross out any words conataining {dj} as it is _NOT_ the sound we pronounce "gy". {dj} in fact is a distorted {dia} where the two vowels form a diphthong which definitely isn't {ja}...
Maybe {madia} would do it - last consonant cut off from "magyar". The only problem with this solution is that it isn't even nearly global: peoples have {venger} or {ungerese}, or {vengerski}, anything but not the real name... which might be a result of a misunderstanding in the Middle-Ages when the king's "writer" or "noter" Anonymous (yes, that was his name because he was too humble to write his exact name anywhere!) stated that Hungarians must be avians of the great Huns... but it most probably was only a tip from him. Damned whoever...
mi'e .xili,odor.