This essay tries to examine the -position in Greek foreign words, starting from Ancient Greek until the take over in Latin far into the period of a new control order of correct spelling up to the year 2000. While the hard endings of – e. g. th – can be followed by a glottal fricative, one can however argue where the breathing with rh really takes place. In the extensive dictionary by Gemoll one can find that the aspiration of r goes back to the preceding\\ but already silent Sigma σ and Digamma Ƒ [w]. The rest of aspiration is indicated by a special sign (of aspiration) which was placed in front of all vowels so that they <ῥ,Ῥ>were handled in the same way as vowels with an initial [h]. It is to understand that one should write hr, hR (e. g. hRodos) and the h – placed afterwards – presumably would be wrong. As soon as – after a short vowel – rr is placed in between, a following aspiration afterwards was possible (e. g. King Pyrrhos = Пύῤῥος). The written display was optional so the spelling of Pyrros (Пύρρος) was permitted.
In view of this chaos (rooting in Ancient Greek) the spelling of all r (without the ) could be a relief in every day usage (such as *Rythmus, Katarr). In technical language and in topographic traditional spelling the rh can/may/should be maintained (e. g. Rheinfall).