I would appreciate it if you could look for my great uncle Meir Colonis (or Colon). His first name might also be spelled Mejer. He came to Argentina in the 1920s, and he was likely born about 1897-1907. He was married to a woman named Felicia. He came from Zagare, Lithuania, where the original family name was Kalon or Kolon.
Lock/Kalon in Zagare/Joniskis, Lithuania
Rabinovitch in Papile, Lithuania
Leapman/Leybman in Dotnuva, Lithuania
Olitsky in Alytus, Suwalki, Lithuania
Levin/Lavine in Minsk