The Eblani ( Ἐβλάνοι) or Eblanii ( Ἐβλάνιοι) (manuscript variants: Ebdani [ Ἐβδανοί]; Blani [Βλάνοι]; Blanii [Βλάνιοι]) were a people of ancient Ireland uniquely recorded in Ptolemy's 2nd-century Geography, in which they inhabit a region on the east coast, roughly north of County Dublin.
Ptolemy also lists a "city" called Eblana ( Ἔβλανα), which he locates between the estuaries of the rivers Buvinda (Βουουίνδα) and Oboca (᾿Οβόκα), implying a coastal site between the Boyne and probably the Liffey respectively.
[1] O'Rahilly tentatively suggested that the tribal name, which he speculatively reconstructed as *Ebodanī, may have survived in the toponym Edmann, a region on the east coast, probably in County Louth, occasionally mentioned in early texts.
[2] O'Rahilly's line of reasoning was inspired by the form Ebdanoi [ Ἐβδανοί] found in one manuscript family of Ptolemy's work, but this variant is demonstrably the result of a transcriptional error for Eblanoi ( Ἐβλάνοι) in a majuscule script, where Λ has been misread as Δ, and not vice versa as O'Rahilly reasoned.
[3] Local historian Brendan Mathews has more recently suggested a link with the passage grave system at the mouth of the Delvin river, originally of at least eight tombs, which would have been a prominent landscape feature and established harbour in Ptolemy's day.