See notes under Sorsdesertvs (7A5) and Ac[ - ? - ]+ (8A1).
The name (assuming there is only one name here, as seems likely) is broken by a tear in the parchment approximately one-quarter inch wide, which seems sufficient for two to four letters (for comparison, "Mys" itself takes up one-quarter inch too).
I hesitate to follow ItMiller 619 in conjecturing that Myrmekion (BAtlas 87 L2) is meant here.