My name is also Perschy. Not exactly a common name. My family is also Austo-Hungarian. My grandfather and his brothers didn't arrive until after WWI. They all settled in the Pittsburgh area. I can guarantee you that Perschy is not an American Indian name. However Mary Perschy does look an awful lot like a cousin of mine and the name Mary/Maria is a name repeated over and over again in my family tree. I'm not at all familiar with Native culture but I would assume that a wondering Austrian man ended up in Oklahoma and married into a people. He must have been well respected to have found his way into their cemetary.