1) Irish-language boy name 
[given name] Éogan or Eógan is an early Irish male name, which also has the hypocoristic and diminutive forms Eóganán, Eóghainin, Eóghain and Eóghainn. In more modern forms of Irish it is written as Eóghan or Eoghan. The name is often associated with the Greek name Eugenes, meaning noble born. Etymologists disagree as to the origin ...