The spelling of the surname Gillenwater is quite straightforward when broken down phonetically. In IPA transcription, it would be written as /ˈɡɪlənwɔːtər/. The first syllable is represented by the sound /ˈɡɪl/, which is pronounced like "gill" or "jill". The second syllable is pronounced with a long "O" sound, /nwoː/, followed by the sound /tər/ for the final syllable. Despite its length, the name is phonetically regular and easy to read aloud.