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