Sefton rhymes with:
lefton, buffton, chieftain, clifton, crafton, crofton, grafton, lefton, lifton, lofton, roughton, tifton, trafton
Sefton sounds like:
sabatine, sabatini, sabatino, septima, shipton, skipton, soften, soviet-union, spadoni, spethmann, spoden, sputum