Lonzo was a male Ferengi, a known tongo hustler on which Odo received a bulletin in 2371.
Lonzo participated in a tongo game with Odo, who was at the time "joined" with Curzon Dax, and was cleaned out by him. (DS9: "Facets")
Lonzo was portrayed by background actor Mark Barrett who received no credit for his role.
His costume was previously worn by Lee Arenberg, portraying the Ferengi Gral in the episode "The Nagus" and sold off on the It's A Wrap! sale and auction on eBay. [1]