Born: year? month? day? in ?
Notes: Lambiek Comiclopedia (https://www.lambiek.net/artists/f/francho_leon.htm) suggests that Leon Francho was probably the Argentine artist Arnoldo Franchioni, who often used the penname "Francho." If that is proven to be true, we will merge our "Leon Francho" and "Arnoldo Franchioni" entries.