Willenborg rhymes with:
cyborg, lundborg, nyborg, trelleborg, cyborg, georg, lundborg, nyborg, trelleborg, barg, bjorge, borg, bosarge, bourg, bridesburg, cherbourg, cyborg, forgue, fribourg, garg, georg, heisbourg, joerg, karg, kharg, labarge, laforge, lundborg, luxembourg, mchargue, meharg, morgue, npr.org, nyborg, org, richbourg, robarge, sorg, strasbourg, trelleborg, yekaterinburg
Willenborg sounds like:
wallenberg, wallenberg's, wollenberg