Misspelt role name. The Pinchgut LIVE release of the 2013 Il Giasone (Presto product page https://www.prestomusic.com/classical/products/8469344--cavalli-giasone-live , the recordings own related URL) prints the role throughout its track list, e.g. "Act I: Lassa, che far deggio? (Isifile)" and "Act II: Io pur ti tocco, o lido (Oreste, Isifile)"; the rip of that release in the library carries the same names in its track titles. Cavallis characters are Isifile (Hypsipyle) and Oreste.