The ornamental design for a paperrollholder, as shown and described.
FIG. 1 is a front perspective view of a paper roll holder showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a top plan view thereof, the bottom plan view thereof being identical;
FIG. 4 is a right side elevational view thereof; the left side being a mirror image; and,
FIG. 5 is a back elevational view thereof.
The fixture and flange holes, flanges, and associated hemispheres, are shown in broken lines for illustrative purposes only and form no part of the claimed design.