The ornamental design for a dollholder, as shown and described.
FIG. 1 is a front perspective view of a doll holder;
FIG. 2 is a front view of the doll holder shown in FIG. 1;
FIG. 3 is a rear view of the doll holder shown in FIG. 1;
FIG. 4 is a side view of the doll holder shown in FIG. 1;
FIG. 5 is a side view of the doll holder shown in FIG. 1;
FIG. 6 is a top view of the doll holder shown in FIG. 1; and,
FIG. 7 is a bottom view of the doll holder shown in FIG. 1.
The present application is directed to the shape and contour of the design illustrated in the drawings. The broken line showing of the environment is for illustrative purposes only and forms no part of the claimed design.