"Lieutenant Commander (Lt Cdr)" . "Lieutenant & Commander" . "surgeon lieutenant commander" . "Lt.Cdr." . . . . "Lieutenant Commander" . "first officer" . "First Lieutenant" . "Lt Cdr" . . . "Lt Cmdr" . "Lieutenant commander rank" . . "Lt Cdr (A)" . . "Lieutenant commander (Royal Navy)" . "Lieutenant-Commander" . "Lieutenant commander (Royal Navy)" . "commander" . "Second Lieutenant" . "Surgeon Lieutenant-Commander" . . "Surgeon Lieutenant Commander" . "Lt. Cdr." . "honorary lieutenant commander" . . "Divisional Director" . . "First Officer" . "lieutenant-commander" . "First Lieutenant (Commander)" . "Lieutenant commander" . "Lieutenant Commanders" . "lieutenant commander" .