Mathematician:Leonhard Paul Euler/Linguistic Note

Linguistic Note on
The correct pronunciation of ' is Oi-ler', consistent with convention in Germanic languages.

Uninitiated English native speakers may be tempted to pronounce Yoo-ler, but this is definitely wrong.

Consequently, noun phrases which begin with 's name would be preceded by "an" rather than "a", for example an Eulerian graph.