400+ Irish Last Names (With Meanings and Popularity)

Keigan is a masculine name with Scottish and Irish Gaelic roots, likely derived from the surname Keegan (from the Gaelic 'Mac Aodhagáin' meaning 'son of Aodhagán,' a diminutive of Aodh, meaning 'fire'). The distinctive spelling with 'i' instead of 'e' gives it a modern twist while maintaining its Celtic heritage. Keigan emerged in popularity primarily in the late 20th and early 21st centuries as parents sought unique variations of traditional names. It fits well with the trend of strong-sounding boy names ending in '-an' or '-en.' While not among the most common names, Keigan has steady usage in English-speaking countries, particularly in communities with Scottish or Irish connections. The name suggests strength, vigor, and a fiery spirit.

Fagan is a masculine name of Irish and Gaelic origin, derived from the surname 'Ó Fágáin,' meaning 'little ardent one' or 'small fire.' As a given name, Fagan has historical connections to both Celtic and Anglo-Saxon traditions. The name appears in literary contexts, including as a character in Charles Dickens' 'Oliver Twist,' though this association has sometimes limited its popularity. Fagan has never been particularly common but maintains a steady presence in Ireland and among those with Irish heritage. The name carries a distinctive, somewhat rugged quality with its strong consonants and straightforward pronunciation, appealing to parents seeking a name with Celtic roots and historical depth.

Kerwin is a masculine name with Anglo-Saxon origins, derived from the Old English elements 'ceorl' meaning 'free peasant' or 'man' and 'wine' meaning 'friend.' The name can also be found as a surname in English and Irish contexts. Kerwin saw modest popularity in the United States during the mid-20th century, particularly in the 1950s and 1960s, but remains relatively uncommon. The name has some recognition through figures like American astronaut Kerwin Washington and various athletes. While never achieving mainstream popularity, Kerwin has maintained steady if limited usage. The name possesses a distinctive sound that balances traditional roots with a somewhat modern feel, appealing to parents seeking an uncommon name with authentic historical origins.