The surname "Houtchens" is pronounced as [haʊtʃənz]. The word begins with the "h" sound, which is followed by a diphthong "ou" pronounced as [aʊ]. The next sound is "t" pronounced as [t], followed by "ch" pronounced as [tʃ]. Finally, the word ends with "ens" pronounced as [ənz]. According to the International Phonetic Alphabet (IPA), this spelling of "Houtchens" accurately represents the pronunciation of the word.