from The Century Dictionary.
- noun A falsetto tenor voice, or a singer with such a voice; particularly, an artificial soprano.
Sorry, no etymologies found.
The star was a fat man with a husky tenorino voice, who sang drunk and half-naked to a protecting claque of ten thousand hands.
Imperial Purple Edgar Saltus 1889
The young vocalist who sang it from the top of a Passy-Bourse omnibus on that fateful day of Wörth, claimed to be a tenor, but was more correctly a tenorino, his voice possessing far more sweetness than power.
My Days of Adventure The Fall of France, 1870-71 Ernest Alfred Vizetelly 1887