This stuff about Galicia is a bit misleading (especially given the scope for confusion with the other Galicia). Łańcut is in the province of the Subcarpathians (Subcarpathian Voivodeship) in the far south-eastern corner of Poland.
What interests me slightly is the extent to which these ideas of identity are important. For Smetana (for example), being a Bohemian as well as a Czech seems to have been very important to him, but maybe less so to Dvořák. Is this at all related to their places within the Young vs. Old Czech political divide or is this reading too much into the situation?
That's a very interesting question. A couple of additional thoughts. Smetana's Czechness became extremely important to him even though he didn't start to learn the language until after the 1848 revolution. In Dvořák's case the music may suggest a more cosmopolitan world-view, but I don't think that makes Czech identity any less significant to him. And of course Janácek's Moravian identity was of phenomenal importance both to his music and to J. personally, but so was his generally Pan-Slavic outlook (and later, so was the establishment of the Czechoslovak nation in 1919 - viz. J's passionate support of President Masaryk).