An example of namely is someone saying that the cat next door was the one that killed the bird.
Origin of namelyME: see name and -ly
A synonymous expression is the use of colon"”":", as in "There are three ways to do it: the right way, the wrong way ..."
Considered a dependent clause, a comma should follow the expression and either a semicolon or comma should precede it, depending on the strength of the break in continuity. "Namely" can thus almost be considered a conjunction.
From name +"Ž -ly.