I always had trouble pronouncing that, and I'm a quarter Polish! ;-) I've called that icon "Our Lady, Queen of Poland."
They have established a feast day in Poland to celebrate the Black Madonna, Our Lady of Czechtohowa, as Queen of Poland.
It was amazing to be in Poland -- nearly 99% Catholic. It makes my heart ache that we are not dedicated to the Mother of God like the country of Poland is. All of our guides in Poland were Catholic and gave us lots of Catholic facts too.