"Keasler" is a surname that is spelled phonetically as [ˈkiːslər]. The first syllable of "Keasler" is pronounced with a long "ee" sound, followed by a soft "s" sound in the second syllable. The final syllable is pronounced with a neutral "uh" sound. While there are no official rules for spelling surnames, it is common to use a phonetic approach to determine the correct spelling. Overall, "Keasler" is a straightforward spelling with a clear and simple pronunciation.