Petersen rhymes with:
peterson, pettersson, peterson, pettersson, batterson, brodersohn, catterson, chesterson, kesterson, masterson, otterson, paterson, patterson, peterson, pettersen, petterson, pettersson, waterson
Petersen sounds like:
paterson, patrician, patterson, pedersen, pederson, pediatrician, peterkin, peterson, petrosino, petrossian, pettersen, petterson, pettersson