According to Wikipedia, the Scipios (as in Africanus) were known collectively as the Scīpiadae rather than the Scīpionēs. This was a rather poetic Greek way to say "sons of Scipio", as in the Atreïdae (sons of Atreus).
In Latin, following the penult rule, this name would be pronounced Scīpíadae. But in Greek, it would be Scīpiádae.
Do we know which of these pronunciations was used? In other words, do we know if the people who affected Greek-style names also pronounced them the Greek way?