Spethmann rhymes with:
boothman, gathman, heathman, kathman, othman, rathman, rathmann, rothman, strathman, strothman, toothman, worthman
Spethmann sounds like:
sabatine, sabatini, sabatino, sefton, septima, shipton, skipton, soften, soviet-union, spadoni, spoden, sputum