I am writing a short text involving the notion of "Eulerian path". My problem is that I'm not sure about the pronunciation of the word "Eulerian", so I don't know whether I should write "a Eulerian path" (in case it sounds like "you-lerian") or "an Eulerian path" (in case it sounds like "oi-lerian"). After some research, it seems that the correct English pronunciation for "Euler" is "oiler" (source: OED). However, my version of the OED does not seem to have an entry for "Eulerian". A few people over the internet seem to claim that OED states that "Eulerian" is pronounced "you-lerian" although "Euler" sounds like "oiler". A few other people claim that "Eulerian" should be pronounced "oilerian".
So, what is the correct pronunciation?
NB I know "eu" is pronounced "oi" in German, but I'm interested in the English pronunciation of the word "Eulerian" (each language has its own conventions about words derived from foreign names).