How come the vowel "eu" of Reuter pronounces as "oi?" Would there be other similar cases as well?

Native speaker’s answer
Rebecca
Good question! This is because the name "Reuters" is not actually English at all! It is a German surname and is pronounced "Royturz." In German, "eu" is pronounced like "oi/oy." Thus, it does not follow English pronunciation rules! If you see other German words with "eu," they are likely pronounced this way as well.