Liljegren rhymes with:
ahlgren, almgren, berggren, bergren, blomgren, cedergren, edgren, elvgren, forsgren, halgren, hallgren, helgren, holmgren, hultgren, lagergren, landgren, lindgren, lofgren, lovgren, lundgren, lungren, malmgren, mellgren, nordgren, nygren, ogren, ostergren, palmgren, rosengren, sandgren, seagren, shogren, sodergren, stromgren, westergren, youngren
Liljegren sounds like:
lagrone, lazzarini, leckrone, lecrone, leghorn, legroom, lockerman, lockrem, logogram, loughran, lucerne, lugworm, lukewarm