The spelling of "McKeen" can be explained through its IPA phonetic transcription /məˈkin/. The first syllable is pronounced as "muh" with a schwa sound, followed by "keen" pronounced as /kin/ with a long "ee" sound. The capital letter "M" indicates that McKeen is a surname commonly found in Scotland and Ireland. The origin of this name is from the Gaelic "Mac 'Aodhagain" which means "son of Aodhagan." The spelling variation of "McKeen" can include "MacKeen" or "McQueen."
The word "McKeen" is an anglicized version of the Gaelic name "Mac Eoghainn" or "Mac Eoin", which itself is derived from the Old Irish name "Eóin", meaning "God is gracious". "Mac" means "son of" in Gaelic, so "Mac Eoghainn" translates to "son of Eóin". Over time, the anglicized version "McKeen" emerged, as with many Gaelic names that underwent anglicization during the British colonization of Ireland.