The spelling of the name Walter Keller is straightforward. The first syllable, "Wal-", is pronounced with a short "a" sound, like the word "cat." The second syllable, "-ter," is pronounced with a neutral vowel sound that's similar to the "uh" sound in "butter." The last name, "Keller," is pronounced with a short "e" sound in the first syllable and a neutral "uh" sound in the second syllable. The stress falls on the first syllable of both "Walter" and "Keller."