Rahmin was a Caatati who captained a ship of refugees. When encountered by the USS Voyager, he explained that his family and his people were assimilated by the Borg and were left with nothing. Captain Kathryn Janeway offered him supplies and he gratefully accepted. (VOY: "Day of Honor")
Rahmin was played by actor Michael A. Krawic.
The novelization of the "Day of Honor" television episode gives the character's full name as Temmis Rahmin.