> There are some other big names where the same vowel sequence isn't recognized: Euler (usually pronounced with /ɔɪ/) and von Neumann (not so much). I always h

> There are some other big names where the same vowel sequence isn't recognized: Euler (usually pronounced with /ɔɪ/) and von Neumann (not so much). I always have trouble finding a reference for the sounds corresponding to IPA symbols, so I'm not sure what you're claiming for the pronunciation of either of those. But, at least among the mostly American mathematicians I know, the 'eu' in 'Euler' and 'von Neumann' are usually pronounced the same way we pronounce the same way we pronounce the 'eu' in 'Freud' (which I agree is essentially how I'd pronounce the 'oy' in 'joyed').