The name Sean is a boy's name of Irish origin. Sean is ranked #233 on our popularity charts and is often added to lists like Irish Baby Names and discussed in our forums with posts like "Boys Makeover- Two Middles".
From the experts:
Sean, after a long reign as one of the top Irish boys' names in the US, has now slipped as parents look to fresher Irish choices such as Liam and Aidan. In Ireland, Sean is still in the Top 10, but variation Senan, an Anglicized spelling of diminutive Seanan, is also stylish. While Sean is the Irish form of John, Seanan and Senan may be thought of either as Sean diminutives or relatives of the Latin word "senator".