Here are her father's birth/baptism and her grandparents' marriage, both in the Lutheran church in Modor (also known as Modra and Modern) in Pozsony county, Hungary:
https://www.familysearch.org/ark:/61903/3:1:9Q97-Y39F-CJ2
4528696 620/785
Modor Luth. baptisms
1892
Number 4. born June 27, baptized July 26.
Child: Gusztáv Vilmos Károly, male, legitimate
Parents: Vilmos Maier local butcher and his wife Mária Hauser, both Lutherans.
Residence: Modor II, 173.
Godparents: Mrs. Nándor Hauser born Hedvig Büttner, in Jurjevácz, Croatia, and Alma Büttner self-employed in Jurjevácz -- as their substitute Mrs. Nándor Hauser born Erzsébet Maier.
Officiant: Károly Hollering, Lutheran minister.
https://www.familysearch.org/ark:/61903/3:1:9Q97-Y39F-CGT
4528696 706/785
Modor Luth. marriages
1886
5. on 14th September.
Groom: Mr. Johann Wilhelm Maier, local butcher, legitimate son of ?? Mr. Rudolf Maier Sr., local master butcher and citizen, and his wife Caroline born von Maier.
Bride: Miss Elise Maria Hauser, legitimate daughter of Mr. Ferdinand Hauser, local innkeeper and his wife Elise born von Maier.
Place of origin and residence: Modern; Oedenburg [=Sopron], Modern.
Religion: Lutheran, Lutheran.
Age: 28 years, 26 years born 24 September 1860.
Status: single, single.
Witnesses: Mr. Josef von Maier local farmer; Mr. Theodor Zlocha, mechanic in Vienna.
Announced on 30 Aug., 5 and 12 Sept.
Officiant: the same
Remark: [something about] dispensation from 2nd degree consanguinity is on file in the parish archive.
(The birth/baptism is in Hungarian, so the only difficulty I had there was deciphering the location of the godparents. The marriage record is in German, and there are several words that I cannot even approximate. Edited: thank you to L. König for the help with decipherment. I wonder if the still-missing word is something like "the late"? I haven't yet found death dates for any of these people.)
Edited again: found the ship manifest (
https://www.familysearch.org/ark:/61903/3:1:3Q9M-C9PR-T7QP?i=519, lines 6 to 9). They were on the Kronprinz Wilhelm, sailing from Bremen, 10 Oct. 1905.