The spelling of the word "Leatha" may seem unusual but it follows the English language's rules of phonetics. The IPA phonetic transcription for "Leatha" is ['liːθə]. The initial "l" sound is followed by the long "ee" sound represented by "ee". The "th" sound is represented by "th". Lastly, the "a" sound is pronounced as "uh" as represented by "ə". While this spelling may not be common, it is a valid representation of the pronunciation of this word.