Origin of the Delaney name
Woulfe: a numerous family in Leix (Co. Laois), who were formerly chiefs of Coill Uachtarach, now Upperwoods, at the foot of Slieve Bloom.[1]
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Irish surname
Ó Dubhshláine · 'descendant of Dubhshláine' or 'Dubhshláinge' (Black of the Slaney)
Delaney is an anglicised form of Ó Dubhshláine (also Ó Dubhshláinge), which Woulfe (1923) explains as 'Black of the Slaney'. He describes a numerous family in Leix (Laois), formerly chiefs of Coill Uachtarach, now Upperwoods, at the foot of Slieve Bloom. In the 1890 births index the name was found mainly in Dublin, Queen's County (Laois), Tipperary and Kilkenny.

Woulfe: a numerous family in Leix (Co. Laois), who were formerly chiefs of Coill Uachtarach, now Upperwoods, at the foot of Slieve Bloom.[1]

The design shown is a coat of arms associated with the Delaney surname. In Irish and British heraldry a coat of arms is granted to one person and passes to their heirs; it does not belong to everyone who shares the surname. Many families still use the arms of their name as a symbol of their heritage.
Woulfe gives Delaney as an anglicised form of Ó Dubhshláine or Ó Dubhshláinge, 'descendant of Dubhshláine', which he explains as 'Black of the Slaney'.[1]
From Co. Laois (Woulfe's 'Leix'). Woulfe says the family were formerly chiefs of Coill Uachtarach, now Upperwoods, at the foot of Slieve Bloom.[1]
Both. Woulfe lists Delaney, Delany and Deleany among the forms of the name, and the 1890 births index counted 93 Delaney and 65 Delany entries.[1][2]
Yes. Woulfe gives it as an anglicised form of the Irish surname Ó Dubhshláine, a Laois family.[1]
Note: Matheson's 1890 figures for a surname include its spelling varieties (Matheson, Table Explanation).
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