VIDOVICH is a Croatian surname.
Prior to 1918 the Kingdom of Croatia was part of the Habsburg Empire, thus the confusion with Austria and Hungary.
Ellis Island has 256 records for VIDOVIC (original Croatian spelling where there is a / over the C giving it the sound of CH) and and another 56 for Magyarized VIDOVICS and Italianized VIDOVICH. One is listed as Slovak but the name is of Croatian origin no doubt also some Slovenian.
Austrian is not an ethnic group, about 95% of people in present day Austria are of Germanic origins. Ethnic Hungarians call themselves Magyars (mud yars) Hungary was a name given by outsiders who thought the people there were Huns however they were not they were Magyars.
Hope this is not too confusing.
What was your GMs first name? When did she come to the US? Where did she settle? Answers to those may help trace her exact place of origins. If she indeed came from Croatia there is a great deal of info available that may help you discover your roots and build a family tree.
The root of VIDOVIC is Vid, a male given name which translates to Vitus. The IC ending means son of so the name is a patronymic name meaning son of Vid. Not unlike the type of names in other countries like Johnson, Peteson, etc..
VID m Slovene and Croatian
Croatian and Slovene form of VITUS
VITUS m Ancient Roman
Roman name which was derived from Latin vita "life". Saint Vitus was a child martyred in Sicily.
d. 1095 Feastday: September 15
St Vitus Church was the church of my Grandfather's village in Croatia. And there is a St Vitus Croatian church in Lorain, Ohio and a Slovenian church by that name in Cleveland. Evidently there were 2 St Vitus.
Benedictine monk in the community near Bergamo, Italy. He was a disciple of St. Albert.
Feastday: June 15
Unreliable legend has Vitus, the only son of a senator in Sicily, become a Christian when he was twelve. When his conversions and miracles became widely known to the administrator of Sicily, Valerian, he had Vitus brought before him, to shake his faith. He was unsuccessful, but Vitus with his tutor, Modestus, and servant, Crescentia, fled to Lucania and then to Rome, where he freed Emperor Diocletian's son of an evil spirit. When Vitus would not sacrifice to the gods, his cure was attributed to sorcery. He, Modestus, and Crescentia were subjected to various tortures from which they emerged unscathed, and were freed when during a storm, temples were destroyed and an angel guided them back to Lucania, where they eventually died. So much for the legend. What is fact is that their cult goes back centuries and that they were Christians who were martyred in Lucania. A great devotion to Vitus developed in Germany when his relics were translated to Saxony in 836. He is one of the Fourteen Holy Helpers and is the patron of epileptics, those afflicted with St. Vitus' Dance (named after him}, dancers, and actors, and is a protector against storms. Feast day - June 15th.
Croatian Heritage Museum