I am the cousin of Melissa oneschuk who replied also. Our great grandfather John Oneschuk "Teehahn" came over by boat. I have been researching our last name for quite some time. The name is originally spelled along the lines of Oleszczak. It is a common name in Poland. Kind of like Smith or Jones is here.Our great grandfather is from a place in Poland called "little Russia". I have not yet figured out what part of Poland that is. I will update this if I find anything further.