Thanks for the information you've provided. I know a little about Joseph Retzl, but not much.
His wife (Franziska) came with Joseph, I do not know why Joseph is not showing up in the Ellis Island documents (perhaps they misspelled his name). As for the others, Ferdinand who came later, is my great-uncle Frank (I believe). Joseph and Franziska came to the USA with my grandfather (Johann/Hans) when he was about a year old. Because of money problems, they left their other son (Frank/Ferdinand) back in Austria with family and sent for him when they had enough money. It appears it was about 9 years until Ferdinand was able to come to America. As for the other two Retzl names you sent (Mathias and Theresia), I do not know those individuals.
I believe the Retzl's were Roman Catholic as that is what my grandfather was. I have found a few Retzl's that are still in Austria, but worry that so much time has past that my line of Retzl ancestry is all but forgotten.