Lokve and Delnice are two villages that could be where Mary was born. They are close to Slovenia but in Croatia of today. Many Grguric and Gregoric from Lokve came to USA. When Mary was born, this area was all part of the Austro/Hungarian Empire. That is where the Austria comes from.
From www.ellisisland.org Julka Grguric Lakve 1899 9 Could this be Julia Gregoric the Sister of Mary?