Thelen rhymes with:
belen, bellon, carnegie-mellon, chelan, delane, ehlen, ellan, ellen, excelan, felan, felon, flewellen, helen, hellen, integrelin, jelen, kellan, kellen, lewellen, maclellan, magellan, mcclellan, mcclellen, mckellan, mclellan, mellen, mellon, melon, nelon, pelon, phelan, sellen, sellon, snellen, wehlan, wellen, whelan, yellen
Thelen sounds like:
t-lam, taillon, talamo, tallman, tallon, talman, talon, telamon, tellin', thallium, thalman, thalmann, theilen, thelin, thelma, thielemann, thielen, thielman, tholen, thulin, tillman, tillmon, tilman, tilney, tolan, tolen, tolin, tolman, toolan, tulane, tuolumne, tylan