Looking for any information on my great grand aunt, Mrs. Kathy Vuzio.

In the attached obituary for my great grandfather (Nick Carlo Bozanich, b. 15 Aug 1884 in Vis, d. 15 Jul 1961 in Astoria, Oregon, USA), it references a sister by the name of "Mrs. Kathy Vuzio" living in Yugoslavia at the time of his death.

Kathy's parents were Nicholas Bozanich (b. 1855 in Vis) and Winifred (b. 1865 in Vis).

Kathy and Nick had a brother, John N Bozanich (b. 2 Jun 1888 in Vis, d. Oct 1963 in Cathlamet, Washington, USA).

Any help would be greatly appreciated.