The biography of Massimo Teglio is recorded in Alexander Stille's book "Benevolence and Betrayal". I bought a copy very reasonably second hand on the internet through the Bibliofind site, now part of Amazon. It was cheaper bought with my credit card from the States, than buying a copy in England.
In outline, Massimo was the family rebel: not industrious, besotted with aviation, married to a non-Jew. During the Second World War he became something of a Scarlet Pimpernel, working under an alias and with false documents to save other Jews, smuggling them to safety in Switzerland.