Ewen is a malegiven name, most common throughout Scotland and Canada, due to the influence of Scots in that country. It is a derivative of the Pictish name, Vuen (or 'Wen'), which is the Pictish British cognate of Eoghan in Gaelic. It is also, less commonly, a surname.
It is said to mean "born of the yew (tree)" and is also associated loosely with the Scottish god of the glen. In Gaelic etymology, Euan implies a plethoric (red-faced) individual.
Owen is the predominant Welsh spelling of the name, but Iwan and Iuan are also found, as they are in Cornish) as well. Ouen can be considered the French or Breton spelling of the name.