Ancestry/Genealogy

https://www.familysearch.org/en/wiki/Lithuania_Naming_Customs

Immigrants often changed their surnames to sound more American. Contrary to popular belief, this change was not made at Ellis Island. Within a Lithuanian community, such as the local parish, immigrants may continue to use the original name, while at the same time using English-language equivalents when dealing with local government, census takers, and other English speakers.
Different branches of the same family may adopt various surname spellings. Prior to 1900, formal surname changes documented in local court records are relatively rare. Most surname changes occurred naturally over time.During the early 20th Century, especially the World War I era, surname changes are recorded more frequently, as immigrants or, more often, their children, tried to adopt more neutral surnames.

A child in Lithuania is usually given one or two given names. As well as modern names, parents can choose a name or names for their child from a long list of traditional names; these include: Christian names, i.e. Biblical names or saint's names. Lithuanian common nouns or hydronyms used as names. There are popular names constructed from the words for celestial bodies (Saulė for the Sun, Aušrinė for Venus), events of nature (Audra for storm, Aušra for dawn, Rasa for dew, Vėjas for wind, Aidas for echo), plants (Linas/Lina for flax, Eglė for spruce), and river names (Ūla, Vilija for River Neris). invented names from literature.
names of Lithuanian pagan deities and mythological figures.

There are some popular names of gods and goddesses from Lithuanian mythology that are used as personal names, such as Laima, goddess of luck, Žemyna, goddess of earth, Gabija, goddess of fire; Žilvinas, a serpent prince from the fairy tale Eglė the Queen of Serpents, Jūratė, goddess of the sea, and Kastytis, from the legend about Jūratė and Kastytis. A distinctive practice dominated in the ethnic region of Lithuania Minor, then part of East Prussia, where Lithuanized German personal names were common, such as Ansas (Hans), Grėtė (Gretchen), Vilius (Wilhelm) among Prussian Lithuanians. Some of them are still in use among Lithuanians.