I have some Kiggins in my family, and an Anthony born in 1850 is one of them. I don't have any information on his descendants, but do have a couple of generations of ancestors. They lived in Baltimore city and attended St. Brigid church in Canton.
If you think this fits and would like the info I have, let me know. If you have any information about the above Anthony's sister Anna, who married John Jubb, I'd be delighted to have it, as they are my great-great grandparents.