Lowenstein rhymes with:
borenstein, fleckenstein, frankenstein, goldenstein, grabenstein, hartenstein, liechtenstein, rosenstein, wallenstein, borenstein, brandenstein, brownstein, burnstein, feinstein, fleckenstein, frankenstein, goldenstein, grabenstein, greenstein, hartenstein, hornstein, liechtenstein, reinstein, rheinstein, rosenstein, wallenstein, weinstein
Lowenstein sounds like:
lamston, langdon, langston, langton, lansdown, lansdowne, lanston, lengthen, lenington, limestone, loewenstein, longden, longtime, longtin, longton, lumsden, lunchtime