"Lenahan" is a surname that is pronounced as lɛnəhæn in the IPA phonetic transcription. The word consists of three syllables, with the first syllable being stressed. The spelling of the name follows the English language's inconsistencies in spelling and pronunciation, where written letters don't always correspond to their spoken sounds. The combination of 'e' and 'a' in the second syllable results in the 'æ' sound, which is not easily deducible from the spelling. Nevertheless, Lenahan remains a unique and distinct name in its spelling and pronunciation.