now that doesn't jibe with what I've been told about the Basso brothers: three, but later one dropped out, siblings and two were both racers AND did frame-building too (to very high standards).
I'm sure Picchio and Citoyen will have the "dirt" on the Bassos...But the game in Italy has always been one of sticking a widely-revered racer's name on a bike that may be built by whoever has the bandwidth to fill the order...repeat next year, and so on. There are exceptions but still plenty of contract-built frames flooded the market for decades (and not to say anything against that: many contract-built frames are excellent).