From a number of places. The Maddocks family were from Llanarthney, here in Carmarthenshire. There are lists available of people who converted and went to America. In those days, families were really big and if you had several older brothers who were likely to get the family farm before you, then I suppose you'd think that America would offer a good opportunity. Anyway, they went forth and multiplied like nobody's business!
A great many migrated from Merthyr Tydfil to Utah I believe?