Thanks for the email.
What do you have for details regarding your Steponavicius?
The one I have was Kazimieras Steponavicius/Charles Steponaitis (1889-1963). He was born in Alvitas, Lithuania and migrated to the U.S. in December 1911 after spending some time working in Essen Ruhr, Germany.
He initially lived in the Gary, Indiana area. By 1917, he had moved to New Britain, Connecticut. He served in the U.S. Army from 1917-1919 and then returned to New Britain where he lived until his death.
Anything coincide with your info?