Pieczynski rhymes with:
kwiecinski, buczynski, garczynski, gorczynski, kaczynski, kapuscinski, kocinski, kopczynski, koscinski, kuchinski, kuchinsky, kucinski, kuczynski, kwiecinski, plucinski, raczynski, rucinski, sobocinski, wilczynski
Pieczynski sounds like:
pachinko, pacing, packaging, packing, packinghouse, paging, pajamas, pasing, passanisi, passing, passions, pausing, peaking, pecanins, pecanins', pecans, pecking, peeking, pegging, peking, pezim's, phasing, physician's, physicians, physicians', picinich, pickens, pickens', pickens's, picking, pickings, pickins, picnic, picnics, piecing, pigeon's, pigeons, pigskins, pipkins, poaching, poconos, poignancy, poisoning, poisonings, poisonous, poisons, poking, posing, posnick, possessing, possessions, possums, poznanski, pozniak, psencik, psychogenic, psychokinesis, pugnacious, pushing, pygmies