Hello Jeane.
Sorry , in my genealogy tree have,t name Rzasa. Me by write " Rząsa" this similar for polish spelling. In last time i exploer in Nattional Archive name of son an daughter Gustav &Anna Mazileites( Mazulai ):
Clara Amalie Caroline Gawell born 3.dec. 1885
death 12. dec. 1885
Gawell Oskar Eduard born 10 feb 1888, death Viena (Austria Europe) 1955
Gawell Emma Anna Martha born 15.juni. 1889.