The correct spelling of the surname "Laughner" would be pronounced as /ˈlɔːfnər/. The first sound is a voiced alveolar fricative /l/, followed by an open-mid back unrounded vowel /ɔː/. The next sound is a voiceless labiodental fricative /f/ and then a voiced alveolar nasal /n/. Lastly, there is a schwa sound /ə/ and then an alveolar approximant /r/. Despite its somewhat tricky pronunciation, "Laughner" is a relatively common surname in the United States.