The spelling of the word "Dugan" can be explained using the International Phonetic Alphabet (IPA). The first sound is /d/, a voiced dental plosive. Then comes the vowel sound /u/, a close back rounded vowel. The next sound is /g/, a voiced velar plosive. Finally, the word ends with the sound /ən/, a schwa sound followed by a nasal consonant. Therefore, the word "Dugan" is spelled d-u-g-a-n and pronounced as /ˈdʌɡən/.
The surname Dugan is of Irish origin. It is an Anglicized form of the Irish Gaelic name Ó Dubhagáin, which means descendant of Dubhagán. The name Dubhagán comes from the Gaelic word dubh, meaning black or dark, and the diminutive suffix -agán, denoting little.