Shawn, it depends how far back you want to go for your "origins". According to the old (1923) publication "Sloinnte Gaedheal is Gall" (Irish Names and Surnames) the original Irish Gaelic surnames were variously Ó hÁinle, Ó hAinlighe or Ó hÁinlighe, meaning 'descendant of Áinle' (beauty, also a hero or warrior). The name of a Connacht family who were chiefs of Cinel Dobhtha, also called in later times Tuaohanly and Doohy Hanly, a district in Co. Roscommon, extending along the Shannon and comprising the parishes of Kilglass, Termonbarry, Cloontuskert, and the eastern half of the parish of Lisonuffy.
The O'Hanlys continued to hold this territory, as tributaries to O'Conor Don, down to the 17th century. In the year 1568-9, Gillyerneuf O Haly was nominated by Queen Elizabeth to be captain of the country of Towohaly in succession to his father, and in 1582, Fergananym O Hanly, gentleman, was granted the office of seneschal of Tobahohanly.
The name is now common in many parts of the South of Ireland.
Anglicised forms include O Hanlee, O Hanley, O Henly, Hanley, Handly, Hanly, Henly, etc.