I'm delighted by the way you wrote down the pronunciation of Dedranae! First of all because from what I learnt about this "d turning into j before an r because of assimilation" thing, the r should seemingly still be there but here it's not (maybe it disappears into the a?). And just the fact that you bothered to represent it happening at all! I think it's very audible in Adrian or Sandra for example and yet I don't really see anyone making a note of it.
Of course it's possible the pronunciation isn't even English and there is a language where "dr" just represents the "j" sound which would be no less thrilling!
https://www.behindthename.com/pnl/109883