In early records the name is spelled WOSEIJPKA.
You will find that the given name James has several variations in translation.
His immigration was under the name Wenzl Woseijpka. On his marriage record the name was Wesley Vosipka. On the 1880 census, he is James Wasepa.
In the Nebraska, Kansas Czech settlers book by Sobotka, he is Vaclav Vosypka.