My ancestor Ursula Robida was born about 1810 in Lopata house no. 8, daughter of Laurenz Robida and Catharina Krasowz (Krasovec). She married Joseph Papez on 9-Feb-1836 at the parish church in Hinje. Both of these towns are in the Suha Krajina area WSW of Zuzemberk, Slovenia (previously Carniola or Krain in Austro-Hungarian Empire).
Can you provide additional details about Agnes, like an approximate birth date, husband's name, and did she immigrate to the US? I haven't really spent any time researching the siblings and nieces/nephews of Ursula, but a connection is possible. From my research experience, Robida is a fairly uncommon name in Slovenia, but there were a handful of Robida's who immigrated to the US.