The correct spelling of the name "Dempsy" is actually "Dempsey". This name is of Irish origin and is pronounced as /ˈdɛmpsɪ/ according to IPA phonetic transcription. The first syllable is stressed, and the 'e' before the 'y' is silent. It's important to use the correct spelling of someone's name not only out of respect but also for the sake of clarity and accuracy. So, if you are ever unsure of the correct spelling of a name, it's always good to double-check!