Remains of five letters are preserved. From the left break, the remaining strokes suggest a rho, iota or ypslion, and sigma. There appears to be some space between the sigma and epsilon, so I am inclined to take -ΡΙΣ or -ΡΥΣ as word ending, possibly of a personal name. It is hard to be certain whether we have an iota with some extra strokes (doubling of the vertical, which fails to be parallel, with a short horizontal stroke at the apex of this second vertical), or a very narrow ypslion. There are dozens of names in Greek that end in -ρις and -ρυς, so options for restoration are many. The two letters before the right break are epsilon (definitely) and digamma (probably). The two letters follow each other in the Ionic alphabet (and numerically stand for 5 and 6), but another name is also possible.