Wrenn rhymes with:
bren, brenn, dufresne, gren, hren, kren, krenn, prehn, prenn, rehn, ren, renn, renne, wren
Wrenn sounds like:
warehime, waren, warm, warman, warn, warne, warno, warren, wehrheim, wehrman, wehrmann, werman, werne, wherein, wierman, wireman, worm, worman, worn, wren, wrona, wurm