The spelling of the word "Reagen" is incorrect, as the correct spelling is "Reagan". This word is pronounced with the IPA phonetic transcription of /ˈreɪɡən/, with the stress on the first syllable, "re". The vowel sound in the first syllable is similar to the sound in the word "ray", while the second syllable has a schwa sound, as in the word "again". The final syllable has a clear "n" sound. It is important to spell words correctly, as misspellings can lead to confusion and misunderstanding.
The word "Reagan" is a surname of Irish origin. It is derived from the Gaelic Ó Ríagáin, which means "descendant of Riagán". Riagán is a personal name of uncertain meaning, but it is commonly believed to come from "rí", meaning "king" or "royal", combined with "gán", a diminutive suffix. As for the specific etymology of the name "Reagen", it is likely an Anglicized variation of the original Ó Ríagáin spelling.