Ethnic, lingual and cultural relations between Poles and Lithuanians before WW1?

Dzień dobry :)

My grand-grandmother was born in Lithuania in 1908. Since Lithuania wasn't independent at that time, and I'm aware of the major Polish influence on the country from the days of the Commonwealth, I wonder what kind of relations they had with the Polish ethnicity/language/culture? Could she see herself as a kind of Pole or had anything to do with Polish life? I think that many of the Lithuanians had Polish names at that time, as an example of how the Poles influenced Lithuania - is it true?

Dziękuję bardzo :)

If she spoke Polish then probably yes. Still today there are many Poles in Lithuania and they speak Polish.
On the other hand, if your grand spoke Lithuanian she may even have hated Polish.

Cinek

Some of the Lithuanian gentry who did not speak Lithuanian decided to learn it later on since they ragarded themselves Lithuanian rather than Polish. Their children were not taught Polish.

Thomas Venclova, a Lithuanian writer, learned Polish himself late in his childhood because he was always intrigued what his mother talked about with his sister since they used Polish, their first language, between themselves every time they wanted little Thomas not to comprehend them. Thomas now speaks Polish like a native speaker.

1/2 OT: to get some insight, if you read either Polish or Lithuanian, take a look at this dictionary, approx. dated 1910, more for the social and cultural, than linguistic context of "where" the languages speakers met:

(sorry that I can't post a full link, I'm a guest here)
xxx.mapywig.org/m_documents/PL/ROZMOWKI_POLSKO-LITEWSKIE_1909.pdf
n.