The spelling of the word "mcgibbon" is derived from Scottish Gaelic. It is pronounced /məkˈɡɪbən/, with the "m" sound at the beginning, followed by a short "uh" sound, and then a "k" sound. The "g" is pronounced as a voiced velar stop with the "i" sounding like "ih". The final syllable has a short "uh" sound followed by a "b" and an "en" sound. The spelling might trip up those not familiar with Gaelic, but the IPA phonetic transcription helps clear up any confusion.