I'm sending this because the names are similar and it was common to Polandize Lithuanian names in the late 1800's, especially among the nobility.
My great grandmother was Barbara Gudauski. She married by great grandfather, Simon Ignatius Shlepowicz in Lithuania. (Alternate spellings are Szlepawicze, Slepavicia, and Szlepawicze.) Barbara later married a Giraitis and then a Navickis. My grandfather Simon Ignatius Shlepowicz (same name as his father)emigrated to the USA sometime before 1900.
Now you know as much as I know. I would appreciate any help to learn more.