  Let K be a hyperbolic (-2,3,n) pretzel knot and M = S^3 K its complement. For
these knots, we verify a conjecture of Reid and Walsh: there are at most three
knot complements in the commensurability class of M. Indeed, if n \neq 7, we
show that M is the unique knot complement in its class. We include examples to
illustrate how our methods apply to a broad class of Montesinos knots.
