FIG. 1 is a top, front, and left side perspective view of a toilet paper roll holder showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof, the right side being a mirror image of that shown;

FIG. 5 is an enlarged top plan view thereof; and,

FIG. 6 is an enlarged bottom plan view thereof.

The broken-line disclosure of toilet paper rolls, a hook, and suction cup in the views is for illustrative purposes only and form no part of the claimed design.