Nr.2 in list: http://www.ellisisland.org/search/matchMore.asp?MID=16900218...
the age would fit with your stated birth-year.
First Name: Cacilia
Last Name: Jost
Ethnicity: Hungary, German
Last Place of Residence: R. Fuzes, Hungary
Date of Arrival: Jun 30, 1909
Age at Arrival: 17y Gender: F Marital Status: S
Ship of Travel: Oceanic
Port of Departure: Southampton
Manifest Line Number: 0011
she went to brother-in-law John (Johann)Koppel i think (siphmanifest). last residenz is stated as Rabafüzes which you find on map south-west of Inzenhof not far away, now Hungary.http://maps.google.at/maps?hl=de&rlz=1G1GGLQ_DEAT361&...http://maps.google.at/maps?hl=de&q=9970+Szentgotth%C3%A1...http://www.burgenland-bunch.org/Buildings/HMR/HMR.htm
in the Inzenhof-house-list also some croatians (Hianzen) to find. but Jost is not a croatian name.
St.Emmerich church in Inzenhof - pictures. also a grave of Jost to see: http://www.burgenland-bunch.org/VP/Stemchurch/Emmerich.htm
St.Emmerich cemetery - pictures: http://www.burgenland-bunch.org/VP/StemCem/St-Emmerich-Cemet...
Rabafüzes - pictures: http://www.burgenland-bunch.org/VP/Raabfidisch/Raabfidisch.h...http://www.burgenland-bunch.org/HP.htmhttp://www.austriasites.com/best-of-burgenland/inzenhof.htmhttp://go.to/burgenland-bunchhttp://www.the-burgenland-bunch.org/homepage.htm
some researchers for Jost in Inzenhof/Borosgödör and Rabafüzes/Raabfidisch: http://www.the-burgenland-bunch.org/Surnames/surnames.html