DermotBoy Name — Meaning & Origin

Dermot is a boy's name of Celtic origin, anglicized from the Irish Gaelic name Diarmait (also spelled Diarmuid). The name breaks down into two Old Irish elements: "di," meaning "without" or "free from," and "airmit," meaning "envy" — giving Dermot the appealing sense of someone free from jealousy or ill will. The name carries enormous weight in Irish mythology, most famously through Diarmuid Ua Duibhne, the warrior hero of the legend of Diarmuid and Gráinne. In this sweeping tale, Diarmuid elopes with Gráinne, the intended bride of the High King Fionn mac Cumhaill, sparking a years-long chase across Ireland. Dermot was a popular name among early Irish kings and nobles, and several notable figures in medieval Ireland bore the name, including Dermot MacMurrough, the King of Leinster whose invitation of Norman forces to Ireland in the 12th century changed the course of Irish history.

Dermot is deeply woven into Irish cultural identity. The legendary Diarmuid of Irish mythology was celebrated for his bravery, his loyalty, and the magical love spot on his forehead that made women fall irresistibly in love with him — a detail that has made his story one of the most romantic in the Celtic tradition, often compared to the Arthurian tale of Tristan and Isolde. The name remained strongly associated with Ireland through the centuries, carried by chieftains and poets alike. In more recent times, Dermot has been a solid, well-used name in Ireland across the 20th century, and it gained international visibility through Irish actors and television personalities. It sits firmly in the category of names that feel unmistakably Irish without being difficult to pronounce for English speakers.

Boys named Dermot are often described as dependable and warm-hearted, with a quiet confidence about them. The name has a grounded, no-nonsense feel — it does not try too hard. People tend to associate it with someone who is straightforward and loyal, the kind of person who shows up when it counts. There is also a creative streak that fits the name well, perhaps owing to its deep roots in Irish storytelling and poetry.

Dermot is a rare choice in the United States, where it peaked at #2156 — making it genuinely uncommon and easy to stand out with. In the UK it has seen slightly more use, peaking at #1167. Ireland is where Dermot truly belongs on the charts, having peaked at #30, which reflects its long-standing place as a beloved traditional Irish name. Outside Ireland, you are likely to meet very few Dermots, which could be exactly the appeal for parents who want a name with real roots and a great story behind it.