Caitlynn is a feminine name that represents a modern spelling variation of Caitlin, which itself is an Anglicized form of the Irish name Caitlín (pronounced Katch-leen). The original name derives from the Irish form of Catherine, ultimately from the Greek name Aikaterine, whose meaning remains debated but may relate to the Greek word 'katharos' meaning 'pure.' Caitlynn gained popularity primarily in the 1990s and early 2000s when alternative spellings of traditional names became trendy in English-speaking countries. The double 'n' ending gives the name a distinctive appearance while maintaining the familiar pronunciation. Common nicknames include Cait, Caitie, Lynn, or Lynnie. Though less common than it once was, Caitlynn remains a sweet, recognizable name with Celtic heritage.