Leyor eventually withdrew the Caldonian bid for rights to the wormhole when it became clear to him (with a little "help" from the empathDevinoni Ral) that the administrative demands of maintaining the wormhole would detract from their ability to conduct research. Leyor subsequently agreed to sell the Caldonians' rich deposits of trillium 323 to the Chrysalians who were represented in the negotiations by Ral. (TNG: "The Price")
The script for "The Price" states the pronunciation of Leyor's name as "LAY-or". Furthermore, it describes the character as "...reserved -- with a quietness that comes more from academia than from shyness."